Applications

• DreamShell - The popular alternative operating system for loading games/app from SD Card and IDE Drive
• 240pTestSuite - App containing a bunch of test suites for the Sega Dreamcast's hardware

Audio

• ALdc - A OpenAL 1.2 implementation started by Kazade

Emulators

• Bloom - WIP PSOne emulator for Dreamcast by zcrc
• VICE - Dreamcast port of the VICE Commodore emulator by GPF
• FrNES - NES emulator for the Sega Dreamcast, freshly updated for modern KOS by maslevin

Engines

• nuQuake - Quake engine by MrNeo240
• radQuake5.0 - Quake engine by Ian Micheal
• DolmexicaInfinite - A Mugen-like engine for fighter games
• Voxel Engine - A Voxel engine
• ANTIRUINS Engine - Precompiled 2D engine that uses Lua for game developpement.
• Simulant - A general purpose 2D-3D engine in active developement.

Frameworks

• KOS - The de-facto OS used in most of homebrew/indie project.
• WincastCE - An experimental windows CE shell (?)
• libGimbal - Extended standard library, unit test framework, and core app utilities for DC and more
• SDL/DreamHal/GLdc - SDL library with DreamHal optimizations and OpenGL interop
• DreamSDK - A multitool environment made for Windows. Maintained by Sizious
• BennuGD - A multi-platform engine

Games

• ClassiCube - Custom Minecraft Classic client with online play
• Mario64 - Port of the N64 Classic, Mario 64, by MrNeo
• FNF-DC - Dreamcast port of Friday Night Funkin

Graphics

• GLdc - A OpenGL 1.2 implementation started by Kazade
• LMP3D - A multi-platform 3D Lib. (Looks abandoned but might be good for research)
• DreamROQ - A ROQ video player. (No FPS lock, no sound)
• libDreamroq - A library version of ROQ video player, with sound.
• dreamcast-samples - A repository containing a Dreamcast-specific graphics example for how to use VQ textures as a paletted framebuffer. Useful for emulators and procedural texture generation.

Hardware

• MaplePad - Virtual Dreamcast Controller, VMU and more!
• libMaple - Arduino to Maple commmunication
• Dreamcast Controller USB Pico - Convert your Dreamcast Controller to USB.
• DC motherboard explorer - Motherboard test pads map

Languages

• Ada Hello World - Hello World example using the Ada language by Marc Poulhiès
• dkos - KallistiOS bindings for the D language by LunaTheFoxGirl

Math

• SH4ZAM - Accelerated math and matrix library for the SH4, based on optimized routines from the GTA3 and VC DC ports.

Random

• Homebrew Tests (Protofall)

Testing and Debugging

• dcprof - gprof compatible sampling profiler for the Sega Dreamcast + KallistiOS.
• Dcload-ip - Launch game through your BBA. Classic program by Sizious.
• Dcload-ip with DHCP - Launch game through your BBA, with DHCP support

Tutorial

• dreamcast.wiki - Great resource to start, constantly updated with new info (2023).
• Dreamcast-tutorial Github - A new-ish sets of tutorial with code example. Covers the basic (installing the toolchain, graphics, audio, controller)

Utilities

• Prism - CaptainDreamcast's set of utilities for Physics, files loading, etc. (untested)
• mkdcdisc - Command line tool for generating CDI images designed for the SEGA Dreamcast
• Blender MS3D Exporter - Export your 3d Model in a Dreamcast friendly format.
• DreamHAL - Moopthehedgehog's abstraction layer for SH4. Allow for faster maths.
• LibFatFS - A FAT16 and FAT32 lib to use with the SD card adapter.

VMU

• VMU Development Resource - Massive, up-to-date compilation of VMU development resources
• CrayonUtil - Mostly tools for VMU icons, but also some texture converters. Made by Protofall
• Waterbear - Cross-platform assembler and disassembler for the VMU by Wtetzner
• libElysianVMU - Platform-independent VMU emulator core by Falco Girgis
• libperspective - Uility library used by most of the scene for drawing graphics in VMU apps
• ADVPM - General-purpose audio, music, and SFX driver by jvsTSX
• Tiny 3D Engine - Full-fledged 3D rendering engine by The Rockin'-B
• Monaco GP - VMU port of hte 1979 arcade game
• Beginner Tutorials - Tutorials for beginning VMU development by Candle-Electric