It doesn't get any easier than Audacity. It free as well.

For more advanced multi tracking, try Reaper. Also downloadable from the site.
There is poetry in despair.
try the riffworks demo, but it will cost you 99 dollar if you want the full version
Inspired by Ibanez RGA321F Prestige, Gibson Les Paul Standard
Powered by CAA OD100 standard+ , Mesa 2x12
Affected by Maxon OD808, Mad Professor Deep blue delay