CKEditor - Real-time collaborative future-ready rich text editor
Fachords - Fachords is an online site that provides many resources that you can use to take your guitar skills to the next level.
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
TrueFire - The Best Guitar Lessons Online Fast. Easy. Fun.
Quill - Powerful, API-driven rich text editor
Gitarrero Beginner - Gitarrero Beginner is a multi-featured, and easy-to-use guitar school developed as a guide to help you learn guitar skills and play them comfortably.