A freeware modular music editor
Ranked in these QuestionsQuestion Ranking
Pro It is free
You get the full functionality for free
Pro Lots of plugins
It supports its own plugin format, and there are a lot of community-created plugins.
Pro VST support
VST is supported via a special plugin.
Con Windows only
Rumors are, it can be launched with wine on Linux
Con Not a complete DAW solution
It lacks some typical DAW functionality, although with some trickery you can do anything.