Interesting color related tool. One tool lets you choose up to 5 colors, and the collage wall on the left will auto select photos from Flikr that fit your color theme. Another tool lets you upload an image and it will pick out a selective palette for you based on that image.
http://labs.tineye.com
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Should still be free, albeit limited download size per 24 hr. Lots of clean and even pre-tiled textures.
http://cgtextures.com
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online whiteboard - good suited to make mood boards
https://realtimeboard.com
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