melonDS v0.8.1 is released. melonDS is an open source Nintendo DS(NDS) emulator. melonDS is part of a second wave of DS emulators. There are a few other emulator projects that are part of it, which you might have already heard of. Either way, check them out!

melonDS Features:
* almost-complete 2D graphics
* 3D graphics (software renderer) with texturing, alphablending, lighting
* input: keyboard and joystick, touchscreen
* backup memory
* booting from the BIOS
* resizable video output window, preserving aspect ratio of individual screens

melonDS Changelog:
• fix potential issue generating the config file path under Linux
• fix 3D/2D blending bugs under OpenGL
• fix potential crash under the software renderer when display capture is used
• basic, optional OSD system
• add support for setting key mappings to none
• add fast-forward and pause/reset hotkeys
• fix crash when closing an input config dialog during the joystick mapping process
• fix bugs when changing video settings with no game loaded
• faster IRQ checks
• faster VRAM reads
• 3D/OpenGL: preliminary edge marking
• 3D/OpenGL: fix fog alpha
• 2D: render sprites one scanline in advance (iCarly - Groovy Foodie)
• 3D/software: fix rendering of line polygons
• 3D/OpenGL: add proper-ish support for line polygons
• support multiple joysticks
• add support for mapping keys with modifiers
• add support for mapping joystick axes alongside buttons, remove hardcoded axis 0/1 mapping
• overall better input/hotkey code

Download: melonDS v0.8.1
Source:Here