Simple question. As far as I know Ableton doesn't do metadata. Cubase doesn't do it, according to a recent thread in which Guillermo N. replied. Studio One does, if I need it to, but it makes less sense to re-render a song just to include metadata than to just download a dedicated app for it. Preferably something lightweight, simple, and free. Like this - which I may download when I get home. Just want to see if someone here has a suggestion or a favorite.

 

I simply use winamp.
For more songs; I select them all, right click and properties, then details. I write the informations and that's all. No need an extra software.