Hello,
I though it would be useful for anyone to share the sites I use for free and royalty free game resources, even for commercial games:
Lost Garden: http://lostgarden.com/labels/free%20game%20graphics.html
Really great graphics but not a lot.
1001 Free Fonts: http://www.1001freefonts.com/
All fonts are free for non commercial use UNLESS you pay 20$ for all the fonts. Licencing info: http://www.1001freefonts.com/faq.php
incompetech.com: http://incompetech.com/m/c/royalty-free/
A lot of great music in MP3 and Wave format. Licencing info: http://incompetech.com/m/c/royalty-free/faq.html
soundsnap: http://www.soundsnap.com/
Tons of great sounds here. 5 free sounds a month. Pro account as low as 30$ USD a month for 100 sounds. Licencing info: http://www.soundsnap.com/faq
Other free resources but with risky or fuzzy terms of use and licences
Absolute Background Textures Archive: http://www.grsites.com/textures/ - Good textures but not one of the best sites
Inet 2 Inet: http://www.inet2inet.com/ - low quality graphics
molotov.nu: http://www.molotov.nu/?page=graphics - low quality graphics
The Peoples’s Sprites: http://www.panelmonkey.org/index.php - classic/retro consoles graphics