FTPD lets you connect ur 3ds to pc for easy file transfer without the need of taking out SD card

if you like deltarune or undertale butterscotch 3ds let you play undertale and deltarune ch 1 and 2 on 3ds

twilight menu ++. You can play DS games there

While FBI I believe is part of the modding process take the time to try and install FBI reloaded if you can because it doesn't time out aw much as the normal version.