Dear Textkitters, salute,
Please look and try new app - Biblos.js:
License: GNU GPL
Description: http://diglossa.org/greek/ (screencast 5 min, Russian with English subtitles)
Code: https://github.com/mbykov/biblos.js/
Packages for Win, MacOS, Linux: https://github.com/mbykov/biblos.js/releases/latest
Why Biblos,js use ancient grammar but not modern linguistic: http://diglossa.org/philosophy/
Comments, suggestions and error messages are welcome