Xera is a group from Asturias, Spain, that has brought out some Free Music. In their web you can download the music (in Ogg and MP3 format) which has some Celtic and electronic arrangements. Mi favourite track is Dúrmite, that, if I am not wrong, is a lullaby (You can listen it here, in the player). The group does not has a complete album yet, but the current work done looks very promising.

I repeat, the music is Free. You can download it for free, and redistribute and copy it at no cost.