This program provides just enough glue to use the excellent CodeMirror as an editor for local files.
Do the following:
pip install eow eow --keymap=vim --password=mypassword file-to-edit.txt
Instead of specifying a file on the command line, you may also go to http://localhost:9113/e/file-to-edit.txt.
For what it's worth, the author uses this to edit LaTeX files on a Linux system from within a Windows virtual machine with the help of Windows-only speech recognition software... :)