DSiMenu++ launches ROMs from the SD card via nds-bootstrap, and ROMs from a flashcard!
DSi/3DS/2DS users can change sound frequency from 32kHz to 48kHz for higher sound quality!
It is also the first DS flashcard UI to show animated icons from DSi-Enhanced games! (Can enable animation in settings.)
Also has an option, where you can run the last played DS ROM (ran via...
[DS(i)/3DS] DSiMenu++ - DS(i) Menu replacement