3DText is a very simple text viewer for 3DS. It supports all characters on an average keyboard, nothing too fancy. 3DText cannot write text documents, it can only read them. If you decide to edit the source on Github, you can change the file to read from to anything, or keep it at "test.txt". It can read files that aren't even in .txt format, as long as you change and build the source properly. I made this using ctrulib, so there's a lot of useless stuff in the source code.
v0.9 (current):
-Press Start to exit
-Line breaking when it reaches the end of the screen
v0.8:
-New .smdh and logo
-View text from other file formats