There are two that I've come across. The one that I've been searching for (which played in the comments video at the end of Machinima videos) and recently found, is called "Navasat" by Ted Turner. There's another apparently called "Solar" by Noisestorm. Both of these can be found on YouTube.
End of dubstep is the song
dregnought down
The name of the song that plays at the end of the movie Zodiac is Hurdy Gurdy. The song is performed by Donovan.
Waffle House By Travis Porter
Actually the song at the end of the 2009 Collector film was a song by Korn song that I don't know the name of.
The song is actually called "End Credits"
they play there own tune
Brand New Girl by Ocelot Robot
"Dream On" By Aerosmith
Flightless Bird, American Mouth, plays at the end of twilight at the prom.
Sebadoh - SpoiledGood song and movie
The song is "Baba O'Riley" by The Who