I couldn't find a thread about Latin music(except for the one about your favorite Latin song, but that's not exactly what I wanted). Anyway, Latin songs are a bit difficult to come by it seems. Though this Wikipedia article is useful.
Here are some songs I like:
This one is really fun. Diablo Swing Orchestra- Ballrog Boogie:
http://www.youtube.com/watch?v=gsmAF9cVPm4
According to my friend, Diablo Swing Orchestra has more songs in Latin. I haven't seen any others yet, if I do then I will post them.
Alright fellow Black Sabbath fans, Rondellus is a band that took some Black Sabbath songs, changed the lyrics to Latin and medieval-fied them. Here's one made from the Wizard. Magus:
http://www.youtube.com/watch?v=8y66XDhiync
Check out their album Sabbatum for more similar ones...
This song is from a anime called Elfen Lied. It's a pretty one!
Lilium:
http://www.youtube.com/watch?v=xAHJIyfUSwU
From another anime, Fullmetal Alchemist. Lapis Philosophorum:
http://www.youtube.com/watch?v=-fa0BrN5Ldg
Faun is my favorite! They have a few songs. Here's one:
http://www.youtube.com/watch?v=51DMt8savwU
Also see: Unda, Satyros, Tempus Transit
Rhapsody of Fire- Ira Tenax:
http://www.youtube.com/watch?v=Hk0Q8R1UZPw
And see: Epicus Furor, In Tenebris
Carmina Burana, of course:
http://www.youtube.com/watch?v=n-DgS75lfmw
I'll end this post and put more later, since this is getting a little full.