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PortableApps.com AppCompactor allows you to compress whole directories including applications, file libraries and zip files. The program is a powerful compression tool that unites 7-Zip and UPX inside a user-friendly wizard. For applications, this saves disk space and increases performance when running from a slow media (like flash drives). For archives, this will recompress DLL, EXE, ZIP, JAR, IRC, PYD and BIN files to their maximum compression settings, as well as an option to decompress an app's binary files that were previously compressed with UPX.

All files are tested using UPX's test feature after compressing. Files smaller than 4K are automatically skipped as compressing will not save space on the drive. The standard Microsoft Visual C runtimes are skipped to prevent antivirus false-positives. Advanced configuration can be done with apps in PortableApps.com Format.

Note: As UPX will alter the EXEs and DLLs (reversible using the Decompress option in the AppCompactor) and some apps may have issues with Zip or Jar files compressed further, users should backup software and test it after processing.

Mp3tag views, edits and filters metadata for common audio formats. Information can be manually added, removed, imported and exported to a variety of formats. The program supports online freedb database lookups for selected files, allowing you to automatically gather proper tag information for select files or CDs. It can also rename files based on the tag information, replace characters or words from tags and filenames, import/export tag information, create playlists and more.

The program can even generate playlists from provided audio files. Supports ID3, Vorbis Comments, APE, MP4 and TAK Lossless.

RisohEditor is a resource editor for Win32 development. It supports adding, editing, extracting, cloning and removing resource data in EXE/DLL/RC/RES files. This includes resources such as dialogs, menus, icons, cursors, string tables, message tables etc.

7-Zip is an archive manager that can view and create a wide variety of formats. The program includes folder favorites, optional two-pane view, checksum calculator, file split/combine capability and more. Individual archives can be created with high speed or high compression settings, update options (including update, add/replace, synchronize), split volumes and more. Archives can be secured with standard zip or more secure AES encryption.

Although the official archiver for the open, high-compression "7z" format, the program also supports the creation of multiple formats including ZIP, XZ, BZIP2, GZIP, TAR and WIM. It will extract a long list of other formats, among them RAR, CAB, ISO, ARJ, RPM, VHD, VMDK etc. Even more formats are supported through third-party plugins. Supports many world languages.

Additionally, to use alternative toolbar and file icons, 7-Zip Theme Manager is available.

7-Zip Portable is a wrapper from PortableApps.com, auto-detecting 32 or 64-bit automatically. Alternatively, X-7zip is also available.

There is also a 7-Zip standalone console version.

PeaZip is a feature-rich file archiver with broad support for 200+ file types. The file manager interface includes a hash tool, file wipe, file associations, file splitter, themes, estimated compression level, system benchmark, image crop/rename and much more.

Formats supported include most mainstream archive formats, including ZIP, 7Z, ACE, BZIP2, CAB, GZIP, TAR, UPX, ZIPX, as well as it's own PEA format. Can extact but not create MSI and RAR files.

Note that tools setup through the Task Scheduler are not portable.

Cross platform with clients for Mac, Linux, and BSD, as well as a 64-bit version is available. Alternatively, PeaZip Portable portablizes bookmarks and includes both 32 and 64-bit versions, automatically using the proper one on each PC.

GPU-Z is a lightweight system utility designed to provide vital information about your video card and graphics processor. It supports AMD, ATI, Intel and NVIDIA graphics devices.

DiskGenius is full-featured partition manager, which is designed to optimize disk usage for Windows users. It allows you to resize, extend, split, create, delete, format, hide, copy and erase partition to maximize disk space use.

DiskGenius is a complete disk & partition solution for Windows PCs that helps managing storage space for higher efficiency.

There is also a Lite version available that only features the partition manager. Find the links in the comments or in the associated forum thread.

Blender is a powerful, integrated 3D creation software suite with character/solids modeling, animation, rendering, rigging, shading, motion tracking and post-processing tools. It lets users create high quality 3D graphics, movies and replay real-time, interactive 3D content. Its features can be extended with a variety of plug-ins, scripts, templates and more.

Cross platform (Mac, Linux). The program has been used for a wide variety of functions, including VFX, video edition, modeling etc.

Alternatively:

• Blender Portable from PortableApps (~25% smaller and segregates user scripts)
  
• Outdated X-Blender from WinPenPack

SideSlide is a desktop extension that docks to any screen edge. It allows you to store your favorite RSS feeds, shortcuts to files/folders/URLs, notes, reminders etc. in "containers" that you can arrange, shrink and fold in the workspace. You can also drag-and-drop text/images from your web browser to the workspace to create web snippets.