kgrep searches through a file or files for a specified pattern and displays the target line containing the pattern as well as a certain number of lines on either side of the target line. GNU grep can do this with the -A, -B and -C switches, and other platform-specific grep implementations may have similar functionality. The main advantage to kgrep is that it's small and can be easily used on any system that has Perl5 installed, rather than going through the hassle of installing a different grep binary (this is actually what the author uses it for most often).
Cedar Backup is a software package designed to manage system backups for a pool of local and remote machines. Cedar Backup understands how to back up filesystem data as well as MySQL and PostgreSQL databases and Subversion repositories. It can also be easily extended to support other kinds of data sources. Cedar Backup is focused around weekly backups to a single CD or DVD disc. It supports multisession discs, allowing you to add incremental data to a disc on a daily basis. Cedar Backup also provides a Python library of backup-related functionality.