Thanks to a canceled project, this afternoon I had some time to create a new Editor for Q2A. it's a wrapper for Pell Editor(Demo) developed by Jared Reich.
Considering that this editor is less than 5KB total(about 1KB in GZip), it's the fastest WYSIWYG Editor ever made for Q2A platform.
Download Zip File
Info and installation instructions on plugin's github page.
Thanks and have a good day, Towhid