These projects should all run on the Cardputer in CircuitPython. Extra libraries may be needed from the CircuitPython library bundle - import errors will tell you what you need :P
When using a file in CircuitPython, it needs to be renamed to "code.py" as this is what cPy will look for when running.
A mostly functional, but incredibly basic text editor.
If you open a file, the save menu conveniently fills in the filename for you, so you don't have to write it again to re-save.
Keyboard library from this repository
adafruit_display_text from the bundle
No line scrolling. Once you exceed 7 lines, you're guessing, bud
No folder support. Selecting folders in the SD card folder will break it.
There are no confirmation or warning messages. Use with caution and be sure that you aren't using a repeat filename, or it will overwrite the file without warning.