p7zip 4.45~dfsg.1-2 (i386 binary) in ubuntu gutsy

 p7zip is the Unix port of 7-Zip, a file archiver that archives with
 very high compression ratios.
 .
 p7zip provides /usr/bin/7zr, a standalone minimal version of the 7-zip
 tool that only handles 7z archives. 7z compression is 30-50% better
 than ZIP compression.
 .
 p7zip-full provides 7z and 7za which support more compression formats.
 .
  Homepage: http://p7zip.sourceforge.net/