I've been asked a couple of times about RaylibDC, so figured I'd post some links to that and other resources. Feel free to add your own!

• Raylib4Dreamcast write games in C with the well known Raylib library
• Simulant A cross platform C++ game engine
• Antiruins  A Lua game engine
• Kallistios The underlying framework that makes most Dreamcast homebrew possible, very actively updated and lots of example code
• Dreamcast Wiki Loads of help and tutorials to get started
• DCEmulation Public forum full of useful secrets and lore