SCA Minstrel Homepage
Performing arts information of (nearly) all sorts, period and not.
Cantaria
An archive of music from the Middle Ages (including the Current Middle Ages).
Not only does this site have lyrics, it has audio clips and historical information.
Folk, medieval and contemporary music
Master Efenwealt Wystle
I'm not sure there _are_ any lyrics here, but there is plenty of information about being a bard in the SCA.
Warning: OBNOXIOUS!
Textfiles
This is a mixed bag- there are plenty of SCA-related song lyrics here,
and even more other random things.
The Black Book of Locksley
Perhaps the oldest and largest collection of SCA music & stuff.
The Calontir Songbook
With plenty of non-kindom specific material.