Audacity 3.0
Very pleased that Audacity is still actively developed. I said it before but I think this can't be overstated:<p>Audacity may had some quirks over the years but it's still one of the most (if not the most) accessible tool for audio editing by non-professionals with an adequate feature set. It's used by community radio stations all over the world since it's easy to teach and cross-platform while being free.