In continuing the theme of sharing what applications, themes, gadgets, etc. that I use and love – I present 7zip. 7zip is a FREE, open-source compression program (similar to WinZip).
What will it pack and unpack?
- 7z
- ZIP
- GZIP
- BZIP2
- TAR
What will it only unpack?
- RAR
- CAB
- ISO
- ARJ
- LZH
- CHM
- Z
- CPIO
- RPM
- DEB
- NSIS
Pretty handy! I’ve found it to be a direct replacement for the built-in Windows Compressed Files utility, as well as WinZip. Did I mention that it’s FREE? But with many open-source programs that are provided free, it is very appreciated that you donate to the group that produces it so that they can continue offering it for free. 
7zip Homepage