Back in the day iDeaS was popular emulator for Nintendo DS. Unfortunately, it't not longer in development and the last posts on the official website date back from 2013 and can be seen as a web archive. There are quite some people that still like it and stick to it because it's simple and still fully functional. iDeaS s almost all NDS functionalities and is originally inspired by the UltraHLE emulator. 403z1t