I've been using Back In Time for some time now. It works well and has been very stable. I thought it would choke when my external backup drive was plugged out,

I've been using Back In Time for some time now. It works well and has been very stable. I thought it would choke when my external backup drive was plugged out, but it handles such circumstances well. It creates hard links (just like Apple's Time Machine I believe), which means that snapshots can be quite small.