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Plugins & Media Capabilitiesof Directory OpusSee which formats Opus can handle out-of-the-box and which add-ons you can download to make it do more. Directory Opus is a file manager for Windows. Read my guide, Getting to know Directory Opus, for an introduction. |
- This page does not list all viewers. Directory Opus can hook into 3rd party preview handlers, browser plugins and ActiveX controls (in addition to viewers specifically designed for Opus itself) so this list will obviously never be complete.
- This a list of things which integrate into the Directory Opus user-interface. That is: a) Viewers which allow Opus to display the selected file in its viewer panel and/or as thumbnails. b) Virtual file-systems which allow Opus to treat archives and FTP sites as directories. c) Metadata readers and editors which let you see and change detail about files.
- Directory Opus can also launch and automate standalone third-party programs but that is not the subject of this list. Such a list would include almost every program that provides some kind of command-line interface, scripting support or shell extension.
- See the bottom of the page for explanations of the different columns.
- Archives
- File-Transfer
- Web, Flash & E-Mail
- Documents:
- Office & RTF
- Text-Files
- AutoCAD
- Other (DjVu, RVF, PostScript, XPS)
- Audio
- Video
- Images
- Fonts
- Miscellaneous (EXEs, DLLs)
- Special
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| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RAR | Virtual File-System | Open RAR archives as if they were folders (read-only) | Opus plugin | forum | - | shot | GP Software | - | Bundled | 9 | 8 | - | x64 | Unicode | N/A | USB | Translated | C++ Source | rar.dll, unrar.dll |
| Zip | Virtual File-System | Open Zip archives as if they were folders (read/write) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Yes (but not inside zips, yet...) | N/A | USB | Translated | - | (Built-In) |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| FTP | Virtual File-System | Open FTP sites as if they were folders (read/write) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Yes (if site supports) | N/A | USB | Translated | - | (Built-In) |
| SFTP/SSH, FTPS | Virtual File-System | Open SFTP/SSH, FTPS sites as if they were folders (read/write) | Opus built-in | - | - | shot | GP Software | AU$10 | Built-In | 9 | 8 | - | x64 | Yes (if site supports) | N/A | USB | Translated | - | (Built-In) |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Internet Explorer | View | Web documents (HTML, MHT, XML, etc.). | ActiveX | - | web | shots | Microsoft | - | (With Windows) | 9 | 8 | - | x64 | Unicode | Streams | USB | Translated | - | (Part of Windows) |
| Windows Mail / MIME / MAPI / Contact | View | .eml, .msg, .nws, .rss, .contact files. | Preview Handler | - | - | - | Microsoft | - | (Part of Vista and above.) | 9 | - | - | x64 | Unicode | Streams | USB | Translated | (Part of Vista and above.) | |
| Flash | View | Flash animation playback. The Internet Explorer version of Flash must be installed. (If you use Firefox, Opera, Chrome, etc. then you can install both versions of Flash.) | ActiveX | - | shots | - | Adobe | - | - | 9 | 8 | - | x64 | Unicode | Streams | (If host has Flash.) | ? | - | (Browser plug-in) |
| SWF Helper | Thumb | Flash animation thumbnails. (Not required for Flash animation playback.) Warning: Seems to run very slowly, and even crash, when it tries to process some Flash files. | Opus plugin | forum | web | shot | Alexander Mazuruk | - | - | 9 | 8 | 6 | - | - | - | - | - | - | swfh.dll |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Microsoft Office | View, Thumb | Office documents. Handles formats such as Word (.doc .docx .rtf), Excel (.xls .xlsx), Power Point, Visio... Later versions of MS Office can also view OpenOffice documents. | Preview Handler (Office 2007 and above) or ActiveX (earlier versions) | - | web | shots | Microsoft | Varies | - | 9 | 8 | - | x64 | Unicode | Streams | (If host has MSOffice.) | Translated | - | (Application with installer) |
| OpenOffice | View | Office documents. Setup Guide. Handles OpenOffice's own document formats as well as many Microsoft Office formats. Views WordPerfect documents with some registry changes. Warning: Though it varies with OpenOffice versions, the OpenOffice ActiveX control has been buggy/unreliable over the years and isn't strongly recommended but may be good enough if you don't have MS Office and want something free. | ActiveX | - | web | - | Oracle | - | - | 9 | - | - | x64 | Unicode | Streams | (If host has OpenOffice.) | Translated | Source | (Application with installer) |
| RTF-Viewer | View, Edit | Rich-Text (.rtf) documents. | Opus plugin | forum | - | shot | Dinkelhopper | - | - | 9 | - | - | - | - | - | - | - | - | RTFViewer.dll |
| Windows RTF | View | Rich-Text (.rtf) documents. | Preview Handler | - | - | - | Microsoft | - | (Part of Vista and above.) | 9 | - | - | x64 | Unicode | Streams | USB | Translated | (Part of Vista and above.) | |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Adobe Reader | View, Thumb | PDF documents. | Preview Handler (newer versions) or ActiveX (older versions) | - | web | shots | Adobe | - | - | 9 | 8 | 6 | x64 | Unicode | Streams | (If host has Adobe Reader.) | ? | - | (Application with installer) |
| FoxIt Reader | View | PDF documents. | ActiveX | - | web | - | FoxIt | - | - | 9 | - | - | x64 | ? | ? | (If host has FoxIt Reader.) | ? | - | (Application with installer) |
| FoxIt Preview Handler | View | PDF documents. | Preview Handler | - | web | - | Tim Heuer & FoxIt | - | - | 9 | - | - | x64 | ? | ? | (If host has preview handler.) | ? | - | (Application with installer) |
| PDF-XChange Viewer | View, Thumb | PDF documents. | Preview Handler | - | web | - | Tracker | - | - | 9 | - | - | x64 | ? | ? | (If host has preview handler.) | ? | - | (Application with installer) |
| PDF-ActiveX | View | PDF files (via Adobe Reader). Obsolete: Replaced by other PDF viewers. | Opus plugin | - | - | - | GP Software | - | - | A | 8 | 6 | - | - | Streams | - | Translated | - | pdfactivex.dll |
| PDF-Text | View | PDF files (converted to plain text). Obsolete: Replaced by other PDF viewers. | Opus plugin | - | - | - | GP Software | - | - | A | 8 | 6 | - | - | Streams | - | Translated | - | pdftext.dll |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Text | View | Text files. (And any other file as hex data.) | Opus plugin | - | - | shot | GP Software | - | Bundled | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | text.dll |
| Text-File Thumbnails | Thumb | Text files. | Opus plugin | forum | web | shot | Leo Davidson | - | Bundled | 9 | 8 | - | x64 | Unicode | Streams | USB | Translated | C++ Source | textthumb.dll |
| NFO | View | NFO text files (with proper line-drawing characters) | Opus plugin | forum | web | shot | Leo Davidson | - | - | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | C++ Source | nfo.dll |
| CSV-Viewer | View | CSV files (as a grid of text/data) | Opus plugin | forum | - | shot | Dinkelhopper | - | - | 9 | - | - | - | - | - | - | - | - | CSVViewer.dll |
| CSV Chart | View, Convert | CSV files (as a 2D plot of numeric data) | Opus plugin | forum | web | shot | ScreenSoft / Thomas Schwobe | - | - | 9 | 8 | 6 | - | - | - | - | - | - | csv.dll |
| Source Code Viewer | View, Edit | Text files. Allows you to edit in the viewer pane. Shows source code files with syntax coloring. Note: When installed it will break the ability to display Unicode text files such as .reg registry settings. (Hooks into freeware Scintilla Edit.) | Opus plugin | forum | web | shot | James Dickson | - | - | 9 | 8 | 6 | - | - | Streams | (If host has preview handler.) | - | SourceCodeViewer.dll (May also include SciLexer.dll, Scintilla.dll) | |
| Source Preview Handler | View | Text files. Shows source code files with syntax coloring. See here for list of supported formats. | Preview Handler | forum | web | shot | SmartSoft (SmartFTP) | - | - | 9 | - | - | x64 | Unicode | Streams | - | N/A | (Preview Handler with installer) | |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| DWG Reader | View | AutoCAD .DWG .DWF documents. Setup Guide. | ActiveX | - | web | - | Autodesk | - | - | 9 | - | - | x64 | ? | ? | (If host has DWG Reader.) | ? | - | (Application with installer) |
| DWG Viewer | View | AutoCAD .DWG .DWF documents. Setup Guide. | ActiveX | - | web | shots | Brava | - | - | 9 | - | - | x64 | ? | ? | (If host has DWG Viewer.) | ? | - | (Application with installer) |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| DjVu viewers | View | DjVu documents. Setup Guide. | Preview Handler or ActiveX | - | web | shot | Caminova | - | - | 9 | - | - | x64 | ? | ? | (If host has DjVu viewer.) | ? | - | (Application with installer) |
| RVF File | View | RVF (RichView Format) documents. | Opus plugin | forum | web | shot | Sergey Tkachenko | - | - | 9 | 8 | 6 | - | - | - | - | - | Delphi Source | RVView.dll |
| Postscript-Viewer | View | .PS and .EPS Postscript documents. (Hooks into and requires Ghostscript.) | Opus plugin | forum | - | - | Dinkelhopper | - | - | 9 | - | - | - | - | - | - | - | - | PSViewer.dll |
| XPS | View | Microsoft XPS documents. | Preview Handler | - | - | - | Microsoft | - | (Part of Vista and above.) | 9 | - | - | x64 | Unicode | Streams | USB | Translated | (Part of Vista and above.) | |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| MP3 | Metadata, Thumb (CD Covers) | MP3 audio. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | ~ | ~ | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| MP3 Format Sound File | Metadata Edit | MP3 audio. | Opus plugin | forum | - | shot | GP Software | - | Bundled | 9 | 8 | 6 | x64 | Unicode | - | USB | Translated | - | mp3.dll |
| WMA | Metadata | WMA audio. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | - | USB | Translated | - | (Built-In) (uses wma.dll) |
| WMA Thumbnail Plugin | Thumb (CD Covers) | WMA audio. | Opus plugin | - | - | shot | GP Software | - | Bundled | 9 | - | - | x64 | Unicode | - | USB | - | - | wma.dll |
| WAV | Audio player | WAV audio via tiny built-in player. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | N/A | USB | Translated | - | (Built-In) |
| Windows Media Player | Audio player | MP3, WMA, WAV, etc. audio via the viewer panel. | ActiveX | - | - | shots | Microsoft | - | (Part of Windows) | 9 | - | - | x64 | Unicode | - | USB | ? | - | (Part of Windows) |
| Audio Tags | Metadata, Thumb (CD Covers) | Ogg Vorbis and FLAC audio. | Opus plugin | forum | web | shot | Leo Davidson | - | Bundled | 9 | A | - | x64 | Unicode | Streams | USB | Translated | C++ Source | audiotags.dll |
| Ogg Vorbis & FLAC | Metadata | Ogg Vorbis and FLAC audio. Obsolete: Replaced by Audio Tags plugin. | Opus plugin | forum | web | shot | Leo Davidson | - | - | A | 8 | - | - | - | Streams | - | - | C++ Source | ogg.dll |
| dMC Tags | Metadata | Various audio formats (including iTunes, APE, MPC); hooks into dBpoweramp (3rd party, commercial tool). | Opus plugin | forum | web | shots | Leo Davidson | - | - | 9 | - | - | - | Unicode | - | Sort-Of | - | - | dmctags.dll |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Movie | View, Thumb | Videos (anything you have a codec for). 64-bit version requires 64-bit codecs. | Opus plugin | - | - | shot | GP Software | - | Bundled | 9 | 8 | - | x64 | Unicode | - | USB | Translated | - | movie.dll |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Aura/Mirage | View, Thumb, Convert | DEEP format brushes (.dip); Aura/Mirage project files (.aur, .mir). | Opus plugin | - | web | shot | YoungMonkey / Dhomas Trenn | US$20 | - | 9 | 8 | 6 | ? | ? | ? | ? | ? | - | ? |
| BMP | View, Thumb, Convert | Windows bitmaps. (Output format as well.) | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| DirectDraw Surface (DDS) | View, Thumb, Convert | DirectDraw Surfaces (DDS). DXT1, DXT3, DXT5, RGB(A) texture formats. (Alpha channels currently ignored.) | Opus plugin | forum | - | - | Heiko Achilles | - | - | 9 | 8 | 6 | x64 | - | - | - | - | - | dds.dll |
| EXIF Metadata | Metadata | Optional automatic rotation by EXIF tags. Display of EXIF metadata such as shooting time and focal length. Use of EXIF metadata when moving/renaming files. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | ~ | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| GIF | View, Thumb, Convert | GIF images (Output format as well.) (Including alpha channel.) (Built-in GIF support normally overridden by the Animated GIF plugin.) | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| Animated GIF | View, Thumb, Convert | Animated GIF images. (Supports transparency. Can "flatten" animations into a single large image.) | Opus plugin | forum | web | shot | Leo Davidson | - | Bundled | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | C++ Source | gifanim.dll |
| Icons and Cursors | View, Thumb, Convert | Windows icons/cursors. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | ~ | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| IFF ILBM and .Info Icons | View, Thumb, Convert | Image and icon formats used on the Amiga. See also: Maya IFF. | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| JPEG | View, Thumb, Convert | JPEG images. (Output format as well.) (Lossless JPEG rotation supported where possible.) | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| JPEG 2000 | View, Thumb, Convert | JPEG 2000 Images: JP2, J2K, J2C, etc. | Opus plugin | forum | web | shot | Leo Davidson | - | Bundled | 9 | A | - | x64 | Unicode | Streams | USB | Translated | C++ Source | j2k.dll, j2k-codec_(08|16).lld |
| JP2, TGA, PNM, RAS, DCRaw | View, Thumb, Convert | JPEG 2000, TGA, PNM, Rasterfile, Raw camera images. Obsolete: Split into separate plugins. | Opus plugin | forum | web | shot | Leo Davidson | - | - | A | 8 | - | - | - | Streams | - | - | C++ Source | jp2raw.dll |
| Maya IFF | View, Thumb, Convert | Maya IFF images. (Including alpha.) | Opus plugin | forum | web | shot | Leo Davidson | - | - | 9 | - | - | x64 | Unicode | Streams | USB | - | C++ Source | maya_iff.dll |
| PaintShop Pro (PSP) | View, Thumb, Convert | Paintshop Pro images. | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | - | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| PCX (Zsoft Paintbrush) | View, Thumb, Convert | PCX images. | Opus plugin | - | - | - | GP Software | - | Bundled | 9 | 8 | 6 | x64 | Unicode | Streams | USB | - | - | pcx.dll |
| Photoshop (PSD) | View, Thumb, Convert | Photoshop images (must be saved with a flat copy, as is the default) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| PNG | View, Thumb, Convert | PNG images. (Output format as well.) (Including alpha channel.) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | ~ | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| Raw Digital Camera | View, Thumb, Convert | Raw camera images: DNG, CRW, CR2, RAW, NEF, KDC, etc. | Opus plugin | forum | web | shots | Leo Davidson | - | Bundled | 9 | A | - | x64 | Unicode | Streams | USB | Translated | C++ Source | dcrawrap.dll |
| TGA (Truevision TARGA) | View, Thumb, Convert | TGA images. (Including alpha and pre-multiplied alpha.) | Opus plugin | - | - | - | GP Software | - | Bundled | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | C++ Source | targa.dll |
| SGI Image | View, Thumb, Convert | SGI images (.rgb, .rgba, .int, inta, .sgi) (Including alpha.) | Opus plugin | forum | - | - | joctee | - | - | 9 | 8 | 6 | x64 | - | - | - | - | - | rgb.dll |
| Sony Mavica 411 | Thumb | .411 YCbCr format images from Sony Mavica camera. | Opus plugin | web | shot | YoungMonkey / Dhomas Trenn | ? | - | 9 | 8 | 6 | ? | ? | ? | ? | ? | - | ? | |
| TIFF | View, Thumb, Convert | TIFF images. | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| Video Toaster | View, Thumb, Convert | RTV1 and RTV2 (.rtv) multimedia files. | Opus plugin | - | web | shot | YoungMonkey / Dhomas Trenn | US$20 | - | 9 | 8 | 6 | ? | ? | ? | ? | ? | - | ? |
| Visible Human | View, Thumb, Convert | Images from the Visible Human Project (.fro, .fro, .pd, .t1, .raw) | Opus plugin | - | web | shot | YoungMonkey / Dhomas Trenn | US$20 | - | 9 | 8 | 6 | ? | ? | ? | ? | ? | - | ? |
| Windows Clipboard | View, Thumb, Convert | .CLP (Images only; created via the Windows ClipBook/Clipboard Viewer) | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| Windows Metafile | View, Thumb, Convert | .WMF and .EMF images (typically used for clipart) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | (Built-In) |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| Font-Viewer | View | Fonts. | Opus plugin | forum | - | shot | Dinkelhopper | - | - | 9 | - | - | - | - | - | - | - | - | FontViewer.dll |
| Font thumbnails | Thumb, Convert | Fonts (.fon, .ttf, .ttc, .otf.) | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | - | USB | Translated | - | (Built-In) |
| Windows Font | View | Fonts. | Preview Handler | - | - | - | Microsoft | - | (Part of Vista and above.) | 9 | - | - | x64 | Unicode | Streams | USB | Translated | (Part of Vista and above.) | |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| EXE/DLL Metadata | Metadata | Show program version numbers, company names, etc. in file displays. | Opus built-in | - | - | shot | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | - | USB | Translated | - | (Built-In) |
| Name | Purpose | Formats / Notes | Type | Links | Author | Cost | Bundled | Opus Versions | x64 | Unicode | Streams | USB | Translated | Source Code | Files | ||||
| ActiveX + Preview + Office + Web | View | Various; hooks into other applications and preview handlers to enable some of the viewers above. e.g. Microsoft Office, PDF, HTML, Flash, AutoCAD... 64-bit version can use both 32-bit and 64-bit applications/components. | Opus plugin | forum | web | shots | Leo Davidson | - | Bundled | 9 | ~ | - | x64 | Unicode | Streams | USB | Translated | - | docs.dll, docsf(32|64).ocx, docsvw(32|64).exe |
| MultiView | View | Various; hooks into 3rd party QuickView viewer DLLs if available. 64-bit version requires 64-bit DLLs. | Opus plugin | forum | - | - | GP Software | - | Bundled | 9 | 8 | 6 | x64 | Unicode | Streams | USB | Translated | - | multiview.dll |
| Shell thumbnail extraction | Thumb | Any thumbnails that Explorer can show Opus should show as well. e.g. PDF files, Office Documents, etc. | Opus built-in | - | - | - | GP Software | - | Built-In | 9 | 8 | 6 | x64 | Unicode | - | USB | Translated | - | (Built-In) |
Opus Versions: Some plugins/features require newer versions of Opus. Some plugins became obsolete with newer versions of Opus. Where '~' appears in version column it means the plugin/feature was in that version but was significantly improved in later versions. Where 'A' appears it means an alternative plugin exists for that version which performs a similar purpose.
- Type:
- 'Opus builtin' means features which are part of Opus itself.
- 'Opus plug-in' means a component designed for Opus. Several plugins are installed with Opus while others are available separately.
- 'Preview Handler' means a component designed for the Windows Vista and Office 2007 viewer plugin system, which Opus also supports. Preview Handlers often work just as well as native Opus plugins.
- 'ActiveX' means an ActiveX component, usually designed for use within Internet Explorer, which Opus can also use within itself.
Bundled: Support for many formats is built into Opus or provided by plugins which come bundled with Opus. Support for other formats is provided by plugins which you can download separately. Filter on the "bundled" column if you're only interested in what you get out-of-the-box or what you can add-on separately. Turn on the Author column if you want to see which plugins are made by third-party authors.
x64: The x64 column indicates the plugins/features supported on the 64-bit version of Opus. Everything is supported on the 32-bit version but some plugins do not have 64-bit versions.
Cost: Almost all of the plugins/features are free (assuming you have paid for Opus itself) but a handful of them cost extra at the plugin/feature author's discretion.
Unicode: Plugins which support Unicode are able to handle file paths with "international" characters. Lack of Unicode support is usually not a problem as Opus will attempt to pass those plugins the "short" version of the file path.
Streams: Plugins which support Steams are able to handle files within archives (Zip, RAR) and on FTP sites. That is, you can view a file from within an archive or FTP site without having to extract/download it first, if the plugin supports it.
USB: The USB column indicates which plugins are safe for export to a portable USB copy of Opus. Plugins which flag themselves as USB-safe must not modify the registry and must store their configuration (if any) in a specific way that allows it to travel with USB copies. When you do a USB export you will be asked which USB-safe plugins you wish to include. You can manually copy "unsafe" plugins after doing a USB export if you know they are safe or don't care that they may modify the registry.
Translated: Opus itself is translated into several different languages and the same is true for some of its plugins. Many plugins do not display any text beyond their name and description in the plugin list, so lack of translation is usually not a big deal. Most of the plugins that have complicated GUIs have been translated.
Where '?' appears in a column it means the feature hasn't been tested. Such columns have been color-coded & filtered based on educated guesses.
These things may appear in the Purpose column:
View: Lets you to view files in the preview pane and standalone viewer windows.
Thumb: Generates small images for display in Thumbnails and Tiles modes.
Convert: Enables conversion from the format(s) it handles to BMP, GIF, JPEG or PNG.
Edit: Allows you to edit files in the preview pane (e.g. using an embedded text editor).
Metadata: Extracts data from files for display in Opus columns and tooltips. This data can also be used when renaming; for example, you can insert the time a picture was taken, or the title of a piece of music, into filenames.
Metadata Edit: Allows you to view and modify metadata in the preview pane.
Virtual File-System: Lets you browse things like archives and FTP sites as if they were normal directories.
