[ALUG] Linux Astronomy software

A while ago someone posted here asking for Linux software that performed a function similar to a windows package, and as it was one I'd heard of, I think it was either k3CCDTools or Registax. If it was k3CCDTools, then I've just started to use the qastrocam software, which I think does a very similar job. If it was Registax, did you ever find anything? Matt