Tip
The Resources are free to use, but the References are protected under copyright law.
Resources
Freelance artists: game-artist.net/forums
Public domain music: pdinfo.com
Public domain sounds: pdsounds.org/tagadelic/taxonomy/1
Public domain images: publicdomainpictures.net
Public domain characters: pdsh.wikia.com
References
Game musicians: en.wikipedia.org/wiki/List_of_video_game_musicians
Game music: vgmusic.com
Remixed music: ocremix.org
Game manuals: replacementdocs.com/news.php
Game maps: vgmaps.com
Sprite sheets: spriters-resource.com