| RARReg | | Offers downloads, support forums and registration for RAR compression tools. |
| RICAZip from CAPTEC | | High performance lossless image compression applications, utilities and libraries. |
| SHCODEC | | A efficient static huffman coder. The package contains source code, test program and documentation.. |
| Smacker Video Technology | | A compressor for video, animation and sound data includes video compression with twice the video quality and now uses the Bink audio codec for perceptually lossless 8 to 1 compression. |
| Spirit Corp | | Offers MP3 codecs and voice compression algorithms. |
| Tomeraidit | | Creates compressed TomeRaider files, allows unsurpassed text compression (45%-60%), plus TR files are portable between platforms of Windows, PDA (palm, pocket PC or psion) |
| USENET Compression FAQ | | This URL takes you to a compression FAQ that explains compression to technical people as well as describing the various programs, and what they do to users. |
| WarpZip | | Data compression utility for the OS/2 family of operating systems. Extensive drag and drop implementation and speech enabled utility that deals with "zip" and OS/2 "packed" archive formats. |
| WinAce | | Relative new though already used on many sites. When compared to WinZip the most important advantage of WinAce is better compression. |
| WinZip | | WinZip is a windows data compression utility that focuses on the Zip data compression format for windows users. It took the lead from PKZIP when windows was introduced. |
| WinZip Splitter | | Split and rejoin WinZip(R) archives for e-mail transmission in two mouse clicks. |
| x-PRESS | | Delivers cross-platform data compression for data transfer, archiving, and retrieval.Part of the CoSORT family of sort and data manipulation solutions. |
| Xceed Software Inc. | | Makers of Zip and Unzip data compression controls for Windows developers that use ActiveX, OCX, VBX and DLLs. |
| XMill | | Compressor for XML data, available as source code and binaries for Windows and Linux. [Freeware] |
| ZBit Inc. | | COM objects to Zip and Unzip files. |
| ZipALot | | Takes all the ZIP archives from one directory and extracts them to another one, allows you to handle more than one ZIP archive at once. Free open-source software for Win32. | |
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