Audacity is probably one of the most well known and most popular open source applications. I thought seriously about just not posting about it, but recently used it to do some fun things with capturing old vinyl records to my computer and thought I should at least put a plug in while I was thinking about it. Audacity is an audio editor and recorder that runs on the three major platforms, Windows, Macintosh and Linux. It is simple to use for basic things and can be as complex as you want it to be. In my most recent use of Audacity, I was digging through my many boxes of old vinyl LPs (records, or big black CDs as my children once called them) and found some old 78s from the early 1950s.