Portable Free Apps : Use it And Enjoy it

7-Zip works in Windows 98/ME/NT/2000/XP/Vista. There is a port of the command line version to Linux/Unix.
Features of 7-Zip:
o High compression ratio in new 7z format with LZMA compression
o Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
o For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
o Strong AES-256 encryption in 7z and ZIP formats
o Self-extracting capability for 7z format
o Integration with Windows Shell
o Powerful File Manager
o Powerful command line version
o Plugin for FAR Manager
o Localizations for 69 languages

PIM is a new high performance file archiver. The hightlight of PIM is high compression ratio.

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

PeaZip is a cross-platform file and archive manager. Features volume spanning, compression, authenticated encryption. Supports 7Z, 7-Zip sfx, ACE, ARJ, BZ2, CAB, CHM, CPIO, DEB, GZ, ISO, JAR, LHA/LZH, NSIS, OOo, PAQ/LPAQ, PEA, QUAD, RAR, RPM, split, TAR, Z, ZIP.

Portable 7-Zip 4.64 is available, and you can update the old version now.

7-Zip is a popular file archiver, and it’s an open source software. You can use 7-Zip on any computer, including a computer in a commercial organization. 7-Zip Features:
* High compression ratio in new 7z format with LZMA compression
* Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
* 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 69 languages

7-Zip is a popular file archiver, and it’s an open source software. You can use 7-Zip on any computer, including a computer in a commercial organization. 7-Zip Features:
* High compression ratio in new 7z format with LZMA compression
* Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
* 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 69 languages