rSIGNAL - ruby Simple Inter-Interface Generic Aggregation Layer. It allows external data sources to be aggregated, store the aggregated data and print the aggregated data out in a transformed format to a file (or integrated HTTP server) on demand.
smarbs is a simple backup script written in ruby. Using rsync it creates full snapshots in certain intervals within a minimal use of space. smarbs is easy configurable via config files and can be run as a cronjob.