software // data compression

• Archivemail - A tool for archiving and compressing old email in mailboxes. It moves messages older than the specified number of days to a separate mbox format mailbox that is compressed with gzip. It can also be used as a backup tool.
• DAR - Disk ARchive - An archiving tool and a replacement for tar with features such as: archive merging, compression, directory tree snapshots, differential backup,filters, and slices.
• The gzip home page - Data compression utility.
• The zlib Home Site -- A Massively Spiffy Yet Delicately Unobtrusive Compression Library - Data compression library; includes a listing of applications using zlib.
• UPX - Ultimate Packer for eXecutables - A free, portable, extendable, high-performance executable packer (file compression) for several different