there are a couple for me:

The Impossible - Joe Nicohls, the songs message is powerfull.
http://www.youtube.com/watch?v=33LdMd47QGM

then there are a couple songs that got me through a break-up,

Zerrisen - Juli
http://www.youtube.com/watch?v=XIVpcMT7BL0

Prefekte Welle - Juli
http://www.youtube.com/watch?v=yy9I5Q2uljE&feature=related

warning, the two previously listed songs are in German, but the translations are depressing, espeacially for the time period that i listened to them, Prefekte Welle translates to : "Perfect Wave" and it is describing the perfect day with her recently broken up with boyfriend, the translation of Zerrissen is "Torn", and this is its chorus in english:
"Which has you so torn
which has you so hurt
which has you and yours zerfetzt
in such a way to live and your heart"

ill post more later,