Know any good sites that have open source textures?

[psychospacecow]

I'm just trying to be cautious about this. Our programmer on Tharna suggested I use textures on these.

http://imgur.com/fCQor0e
http://imgur.com/QpMq3n5
http://imgur.com/2IT5eFN
http://imgur.com/tJ798UZ
http://imgur.com/sF08CtT
http://imgur.com/wY3mvuI

Know any sites that I could trust?