I think it would be very helpful to have a list of websites that would be useful for Amiga game developers. I would like to update the main post whenever we find some new resources to add to the list.
Programming
Amiga Coding Wiki - Wiki for Amiga coding and development resources.
Amiga ASM & HW Coding - AmigaVikke's site about coding on the worldfamous Amiga computer from the '80s.
Amiga-Development Forum - A forum dedicated to all forms of Amiga development. Includes backup of UtilityBase forum.
AMOS Factory - Includes manuals, AMOS extensions, example programs and even development versions of the AMOS 2.1 with bugfixes.
Game Creators
Backbone - Tutorial on making games the easy way with Backbone. Includes links to the software.
Graphics
Open Game Art - A solid and ever-expanding variety of high quality, freely licensed art.
Pixel Joint - Pixel Art Forum. Browse galleries of examples, post your own work and get help and critique.
Pixelation - A setting in which people may sharpen their skills by posting work and receiving critique from others.
Sound
Indie Game Music - The Music Resource For the Indie Game Developer. Includes plenty of mods.
Free Music & Chip Tunes - Kindly provided by Hukka for use in our Amiga productions.
Design
Tile-Based Games FAQ - Extensive guide on designing tile-based games for low-end systems.
Publishing
Aminet - Aminet is a set of interconnected WWW and FTP servers hosting freely distributable Amiga software.
Please feel free to post suggestions and links you think will help make it easier for us to make great new games.