A few freebies/PWYW records from our blog that should fit your description:
Magic Man - My favorite record last year that still brings a smile to my face listening to it.
Exit Island - Great Indie Pop, some songs may fit your description better than others, though.
Gulls - Stupidly fun Surfpop, my summer record of choice for 2012
Swimming - And my summer surfpop record of 2011
Ed7 - Some easy going Instrumental Electronica
Fort Lean More on the Indie Rock side of things, but still very fun to listen to.
Soccer Mom - Super catchy Indie Pop
Dirty Banners Indie Rock/Pop, listen to Heart on especially. Great summer tune. The other songs make me want to dance too.
The Vial Very, very catchy Indie Electronica. I wish those guys made more.
Enjoy!