backup2l is a lightweight tool for generating, maintaining and restoring backups on a mountable file system. The main design goals are low maintenance effort, efficiency, transparency and robustness.
I've been using this tool for years. I love the fact that it does NOT use a proprietary file format, and that I can extract files manually from the archive using just tar if I want to bypass the tool. The fact that it's a simple bash script is also a big plus.
Great tool. Using it for years already.
It gets the job done. Do backup tools need to do more?