Man, it has been YEARS since I tried to rip sprites or do anything like that, but finding that iPhone games can be easily extracted got me thinking about it again. I went through my collection and spotted a few games that had pure PNGs of some of their assets, so I thought I'd share.
No credit necessary.
http://i248.photobucket.com/albums/gg181...-fonts.png
http://i248.photobucket.com/albums/gg181...kdrops.png
http://i248.photobucket.com/albums/gg181...ps-bgs.png
http://i248.photobucket.com/albums/gg181...towers.png
No credit necessary.
http://i248.photobucket.com/albums/gg181...-fonts.png
http://i248.photobucket.com/albums/gg181...kdrops.png
http://i248.photobucket.com/albums/gg181...ps-bgs.png
http://i248.photobucket.com/albums/gg181...towers.png