Fields of hope - tanaka rie - gundam seed
Jyukai - hoshi akari -busou renkin
Sunset swish - Mosaic kakaeru geass end2
Jinn - kaidoku funo geass op2
Suara - Kimi ga tame - utawaremono
yea a lot of em get stuck in my head but I guess this one would be the most stuck atm
http://www.youtube.com/watch?v=cs7pP8rerE8