W is a basic editor that runs at browser
I'll use these libraries.
http://orthes.github.io/medium-editor-insert-plugin/
https://github.com/RadLikeWhoa/Countable
https://github.com/usablica/widearea
http://mailru.github.io/FileAPI/
https://github.com/ccampbell/mousetrap
W by Hüseyin Mert is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Based on a work at http://hmert.com/w. Permissions beyond the scope of this license may be available at http://hmert.com/w.
Other used libraryes have own licenses.