From GameBrew - a wiki dedicated to Video Game Homebrew.
DScritor an application for you to create text writing with the stylus directly on the touch screen on a handwriting. It can also be used as a paint tool to draw.
It was submitted to the NEO Coding Compo 2010 and Scenery Beta 2010.
This application is basically a tool to write text, but by hand, and NDS recognized as one letter to the show on the top screen, then save to MicroSD in TXT format.
It also has a text viewer to read files and paint tool. You can change the background, color and brush size. File will be saved in BMP format to the DScitor folder in the root of the MicroSD.
You will find an image Letters.bmp which indicates how each letter should be written that the NDS recognizes it. It is recommended that the touch screen is in good condition and well calibrated for better detection of letters.
Stylus - Draw characters in the drawing mode
Buttons - Different functions depending on selected mode
Tested on Flashcard M3DS Real with firmware 4.8c.