nds4droid v45 is released. nds4droid is a free, open source Nintendo DS emulator for Android based on DeSmuME. It is currently in it's infancy but does support most of the features one would expect in an emulator.

nds4droid v45 Changelog:

Changed the default key mapping to open the options menu to “KEYCODE_BUTTON_START.” This should be a better default for controller-based systems like the OUYA or the NVIDIA SHIELD. It will require a full reinstall of the app for this default to take effect. Added the ability to access the settings screen from the ROM browser options menu. Enabled compatibility for devices without a touchscreen.

Download: nds4droid v45
Source: Here