Zfsbackup allows you to take full or selective snapshots of ZFS datasets, dump snapshots with automatic full/incremental handling, and maintain backlogs of snapshots for a certain length or age.
snowcp is a fast file copy tool similar to FastCopy and Fire File Copy. It can verify copied files using SHA-1 or MD5. If you copy files to different physical drives, it will work in multi-threaded mode automatically.
A Nagios plugin to check if a Red Hat system is up to date.
A universal TCP client.