Try Musicbrainz picard for a tagger. As for foobar2000... I think nothing on any other platform replaces it, even on windows. You could try quodlibet which has

Try Musicbrainz picard for a tagger. As for foobar2000... I think nothing on any other platform replaces it, even on windows. You could try quodlibet which has tons of features, but it isn't as fast when dealing with hundreds of thosands of songs on a music library and only supports gstreamer as a decoder (which i think sucks). But it has a good interface, multiple ways of displaying your library, proper tag support (instead of just fully supporting a few tags for sorting and stuff). In my setup I end up selecting audacious as the default player, which has a lot of similarities to winamp and some with foobar, but audacious sucks for music libraries. Instead, I keep quodlibet for that task. When I open a random file from the internet or from the file browser, audacious steps in with it's great audio format support, simple and fast interface. When I want to include a song or an album into my collection, it goes trough Musicbrainz picard, then properly installed in the music library directory hierarchy and finally it's available in quodlibet.