Rocka Rolla Album.. and a nice few Zeppelin album are good for chillin.. also you can't go wrong with listening to some of The Appleseed Cast, or Sunny Day Real Estate when chillin.
Sparta "While Oceana Sleeps"
Trophy Scars "Baby Eskimo Kisses"
Postal Service "Be Still My Heart"
Something Corporate "Konstatine"
Straylight Run "Existentialism on Prom Night"
Death Cab For Cutie "Summer Skin"
Thursday "This Song Brought to You by a Falling Borab"
Say Anything "By Tonight"
Belle And Sebastian - Like Dylan In The Movies
The Duke Spirit - Bottom Of The Sea
PJ Harvey - The calmer bits from 'Stories From The City...'
Giant Drag - Slayer
The Libertines - Hooligans On E
My Bloody Valentine - Sometimes
Sonic Youth - The Diamond Sea