DS2x86 by Patrick Aalto is a PC emulator for Nintendo DS. It's purpose is to allow you to run old DOS games on your Nintendo DS game console. DS2x86 is a port of DSx86 port using the SuperCard DSTwo's MIPS processor, therefor it will just run with such a card. Read more about DS2x86 v0.09 (Alpha) (DOS emu for NDS)
StellaDS is an Atari VCS 2600 Emulator for DS and DSi. It's a port of Stella by French developer alekmaul. This emulator supports ROMs in A26 or BIN format. Read more about StellaDS v1.0 (A2600 emu)
ant512 comes up with a remake of "Earth Shaker", a "Boulder Dash" like game, originally released on ZX Spectrum in 1990. It's not yet complete, but looks very promising already and the first few levels are playable. Read more about Earth Shaker DS (19-05-2011) (NDS Game)
Skull Panic by DuskWolf is a Nintendo DS game, written using Micro Lua. You're having one minute to collect items on the screen, but avoid skulls at any cost! Read more about Skull Panic v1.01 (NDS Lua Game)
Project Legends DS-DSi is a Megaman Legends homebrew game/tech demo for NDS and/or NDSi. It's currently a work in progress and has a long way to go! DSi mode available via sudokuhax DSi or DSi-mode compatible flashcard. Read more about Project Legends DS-DSi v002 (Game)