Since you ask...but I'm feeling lazy at the moment so I'll just point you to a direction that you won't get lost. Follow the link and you'll find most (if not all) homebrews and emulators for the NDS....just in case you get lost...everything is on the left side of the site as you scroll down the page. Hope that help you out.
Nintendo DS Emulation News DS Gaming DS Hacking DS Homebrew DS Shop Buy Handheld Nintendo DS DS Emulation DS Emulators DS Hacking DS Roms DS Isos DS Homebrew DS Flash Carts at Lik-Sang.com