The enhanced version of ClassiCube seems to handle the low amounts of VRAM better than the Classic version, which is nearly unplayable. It seems like that’s where the actual development is happening.

You can change controls, use resource packs, join multiplayer, chat in public, save worlds, place liquids, custom blocks, change skins, go into third person, fly and speed hack, change graphical settings, and play custom plugins on servers. Cons are that download speeds on servers can be low (resource packs are 2012 speeds) and you can sometimes run out of sysRAM or VRAM while joining a custom world once leaving a lobby.

The game also freezes up at times during loading. This could be helped by using a second thread to actually do this work and give the user a more interactive progress screen for any behind the scenes stuff, which is currently opaque. Besides that, it’s really impressive, and much more than what I expected from the old 3DS with only 128 MB RAM and 6 MB VRAM.

I haven’t tried it yet, but I think crosscraft is also targeting the 3ds. I wonder how it compares