bzip2
Bzip2 1.0.2
Bzip2 is a tool to compress files to within 10 to 15 percent of the available compression techniques, and is twice as fast at compression and six times faster at decompression than gzip. more>>
Bzip2 1.0.2 is a tool to compress files to within 10 to 15 percent of the available compression techniques, and is twice as fast at compression and six times faster at decompression than gzip. Its command line flags are similar to those of GNU gzip. If data from a back-up tape or disk contains errors, Bzip2 may still be able to decompress those parts of the file that are undamaged.

WinBZip2 1.0.0
WinBZip2 - freeware file compression utility more>>
Main features include the compressing, decompressing and testing the integrity of bzip2 files.
The bzip2 is an command line driven compression utility, similar to gzip, but with more strong compression and more liberal license, also free from patented algorithms and currently popular almost as the gzip. Bzip2 is not archiving utility, i.e. its cant roll up several files together. It simply compress the specified file.
The quote from bzip2 manual: "bzip2 compresses files using the Burrows-Wheeler block-sorting text compression algorithm, and Huffman coding.
Compression is generally considerably better than that achieved by more conventional LZ77/LZ78-based compressors, and approaches the performance of the PPM family of statistical compressors".
Zipeg 2.4
Free utility for Windows to extract from zip, rar and other archives. more>> Free alternative to WinZip, WinRar, StuffIt.
supports wide variety of archive formats:
ZIP, RAR, ARJ, LHA/LZH, 7z, TAR, GZ, TGZ, BZIP2, CPIO, RPM, ISO, CHM, Z, CBR, CBZ, WAR, EAR...
allows to see whats inside archive BEFORE extracting files;
opens files in Preview or any other associated application directly from the archive;
displays image thumbnails (EXIF) in tooltips;
extracts/unzips items simply by dragging them;
easy-to-use user interface;
resource fork, file permissions and Finder attributes support for Mac OSX;
supports filenames in national alphabets in UTF-8, Unicode and codepage encodings;
processes archives in background;
does not have any archive size limitations;
allows to explore CD and DVD ".iso" image files;
reports cumulative contents size of subfolders;
gives fine control over customizable destination of extraction;
automatically opens nested archives;
opens archives via file types associations;
provides `path completion` for destination folders;
sorts content of folders by name, size or date;
automatically checks for latest updates;
universal binaries for Apple Macintosh OS X;
Full Mac OSX and Windows XP/Vista support;
Build on top of powerful 7zip engine;<<less
License:Freeware
PeaZip 2.2
Free archiver utility, open 7Z, ACE, PAQ, TAR, RAR, ZIP, encrypt and split files more>> Free file and archive manager for Windows and Linux, features encryption, secure deletion and file split. Create: 7Z, 7Z-sfx, BZip2, GZip, LPAQ, PAQ, PEA, QUAD/BALZ, split .001, TAR, ZIP. Open: ARJ, CAB, CHM, CPIO, DEB, ISO, JAR, LHA, LZH, MSI, NSIS, RAR, RPM and more. Allows to browse archives, apply multiple inclusion and exclusion filters, save archives layout, export job definition as command line, work on multiple archives at once.<<less
License:Freeware
many archive and compression formats: Full support (read and write): 7Z, 7Z-sfx, BZip2/TBZ2, GZip/TGZ, LPAQ, PAQ, PEA, QUAD, split, TAR, UPX, ZIP. Open, browse, extract, test: ACE, ARJ, CABLicense:Freeware

7-Zip 9.07 beta
7-Zip beta brings you a useful and easy-to-use open source software. Most of the source code is under the GNU LGPL license. more>>
7-Zip 9.07 beta brings you a useful and easy-to-use open source software. Most of the source code is under the GNU LGPL license. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.
Major Features:
- High compression ratio in new 7z format with LZMA compression
- Supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
- Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
- For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
- Strong AES-256 encryption in 7z and ZIP formats
- Self-extracting capability for 7z format
- Integration with Windows Shell
- Powerful File Manager
- Powerful command line version
- Plugin for FAR Manager
- Localizations for 74 languages
Requirements:
- Windows 98/ME/NT/2000/XP/Vista
License:Freeware
compression * Supported formats: 1) Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR 2) Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS * For ZIP and GZIP formats, 7-Zip providesWinImp 1.21
A new file archiver which not only recognises common archive formats more>>
- Extract files from ZIP, ARJ, RAR and TAR archives, decompress GZIP, Unix Compress and BZIP2 files, and decode UUencoded, XXencoded and MIME files.
- Create ZIP archives, and IMP archives with high compression.
- Display the folders within archives in a tree view, similar to Windows Explorer.
- Rename files and folders within ZIP and IMP archives.
- Drag-and-drop files and folders from Windows Explorer into ZIP and IMP archive folders.
- Extract files or folders from archives by dragging and dropping into Windows Explorer.
- Create self-extracting IMP archives
Enhancements:
- Fixed a bug which prevented use of long filenames for extraction on some Windows NT systems.
- Fixed an extraction bug in the self-extractor module which caused an error on some files.
- Added an option to the self-extractor to run a program after extraction.
Zipper 1.6.0
Zipper is a free and animated utility for zipping and unzipping files more>>
Drag files and/or folders onto the Widget and it will compress them into an intelligently named archive, or drop archive files and it will unzip them into folders.
Now supports the following file formats :-
Compression: ZIP, 7ZIP, TAR/GZIP and TAR/BZIP2.
Decompression: ZIP, 7ZIP, TAR/GZIP, TAR/BZIP2, Z, RAR, CAB, ARJ, LZH, CHM, HXS, CPIO, RPM and DEB, plus zipped Widgets and self-extracting executables.

7-zip++ 4.57
7-zip is more efficient than any compression application. more>> 7-Zip can also open any file format that uses a supported compression method. For instance, it is possible to open MSI files in 7-Zip that include the files to be installed with the file itself (otherwise, the files are stored in CAB files, also supported). This makes 7-Zip a good tool to check if a file is an archive.
For ZIP and gzip files, 7-Zip uses a modified implementation of the DEFLATE algorithm that is tuned for higher compression levels at the expense of speed. This implementation is also used in the AdvanceCOMP tools.
The native 7z file format is an open, modular architecture which allows it to contain files compressed
Unicodeusing different algorithms.7-Zip supports a number of other compression (and non-compression) archive formats. These supported formats include ZIP, Microsoft cabinet (CAB) files, RAR, ARJ, gzip, bzip2, LHA, tar, cpio, rpm and Debian deb archives.-Zip also supports ISO CD/DVD images.<<less
PIM 2.90
Compress and extract various types of files. more>>
PIM 2.90 is a professional high performance file archiver. It is extremely easy-to-use and useful.
Major Features:
- High compression ratio with the all new PIMv2 format
- Extract support for BALZ, QUAD, ZIP, JAR, PK3, PK4 and QUAKE PAK archives
- Advanced ZIP archive support featuring PPMd, BZip2 and DCL Implode decompression
- Freeware
- Include unspecified updates
- Enhancements
- Or bug fixes.
7-Zip Portable 4.64
Archive files with this portable app. more>>
7-Zip Portable 4.64 is admitted as the popular 7-Zip which is packaged as a portable app, so you can take your file archiver with you and work with your compressed 7z, ZIP, GZIP, BZIP2, TAR, RAR files and more on the go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.
pkt 2.4
An universal XML packet archiver that can manipulates files for backing up documents and transferring them more>>
By default all pkt output is in 7-bit ASCII which is UTF encoded and is compatible with XML parsers. pkt files can be disassembled, reassembled and repaired by hand if necessary.
pkt also supports the use of 8-bit compressed XML packets for its archives using one of several compression algorithms. In general, pkt will try to use the best algorithms available. pkt uses multiple pluggable user interfaces including GUIs and CLIs.
Main features:
- ASCII or Binary (Compressed) XML Packet Archiving
- BZIP2 Compression System
- Variable LDPC Parity Protection & Data Recovery
- NIST FIPS-197 AES 256-bit Encryption System
- RIPEMD 160-bit Secure Hashing Algorithm
- DoD 5220.22-M (CLEAR) Secure File Wiping
- Cross platform, 64-bit ready (if platform supported)
- JDOM XML generator with auto-split
- Legacy TAR,TGZ,JAR,ZIP,TBZ2 archive support
- Basic utilities including calc,clock,conv,hexed etc.
- Pluggable CLI or Thinlet XML GUI Interface
- UUEncoding & UUDecoding Plugins
- SSH/SCP/STUN & VNC Support provided by external snapin
- Fully multithreaded / multitasking GUI
- File merging, hashing, crlf conversion and copying utilities included
- Secure, cryptographically signed JAR distribution

PeaZip Portable 2.7.1
PeaZip Portable is designed to be an advanced and useful file archiver packaged as a portable app, so you can take your file archiver with you and work with your compressed 7z, ZIP, GZIP, BZIP2, TAR, RAR files and more on the go. more>>
PeaZip Portable 2.7.1 is designed to be an advanced and useful file archiver packaged as a portable app, so you can take your file archiver with you and work with your compressed 7z, ZIP, GZIP, BZIP2, TAR, RAR files and more on the go. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.
Major Features:
- Edit, save and restore archive layouts
- Supported formats:
- Pack / unpack: 7Z, ARC, BZ2, GZ, PAQ/LPAQ, PEA, QUAD, TAR, UPX, and ZIP
- Unpack only: ACE, ARJ, CAB, DEB, ISO, LHA, RAR, RPM and more archive types...
- Apply multiple filters to archive contents
- Archive splitting and joining
- Encryption and secure deletion
- File comparison and checksum / hash (CRC, MD5, SHA...)
Requirements:
- Windows 95/98/Me/2000/XP/Vista
License:Freeware
License:GPL

7-Zip x64 4.65
7-Zip x64 is a useful software which is used as an open source. more>>
7-Zip x64 4.65 is a useful software which is used as an open source. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.
Major Features:
- High compression ratio in new 7z format with LZMA compression
- Supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
- Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
- For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
- Strong AES-256 encryption in 7z and ZIP formats
- Self-extracting capability for 7z format
- Integration with Windows Shell
- Powerful File Manager
- Powerful command line version
- Plugin for FAR Manager
- Localizations for 74 languages
SharpZipLib 0.81
open-source .NET compression library more>> SharpZipLib is a free, open-source compression library for .NET. It supports Zip, Gzip, Tar, and Bzip2, and also computes checksums. The library currently lacks Zip file splitting/spanning, customizable self-extracting Zip files, and reading and writing directly to memory. It is ported from the GNU Classpath Zip library for Java. The library and source code is distributed under the GNU General Public License, with an exception.<<less
ActivePython 2.5.1.1
The complete, ready-to-install Python distribution for Windows more>>
Main features:
- Python core
- zlib and bzip2 for data compression
- SQLite (2.5-only) and Berkeley DB bindings (bsddb)
- Tix GUI widgets for Tkinter
- ctypes (2.5-only, on some platforms) for low-level library access
- PyWin32 (Windows-only): a suite of Windows tools developed by Mark Hammond, including bindings to the Win32 API and Windows COM
- Complete documentation for new and experienced Python users

, ZIP, JAR, PK3, PK4 and QUAKE PAK archives Advanced ZIP archive support featuring PPMd, BZip2 and DCL Implode decompression Freeware
Advanced ZIP archive support featuring PPMd, BZip2 and DCL Implode decompression. Requirements: Windows NT/2000/XP/2003 Server/Vista