defragmenter is a braindead filesystem agnostic defrag script that rewrites files. Running it in a directory causes all files and subdirectories to be reordered. It will only affect one partition and works best when run twice.
Sync-n-Tar is a full-featured rsync and tar-based backup utility that provides a fully customizable method for backing up your system.
A data recovery tool.
A mail filtering manager, supporting Sieve, procmail, maildrop and IMAP filters.