cforms 2 and Buttonsnap for WordPress
A (long) while back, I created a library for WordPress that allows plugin developers to easily add new buttons to the editing area, regardless of whether an author was using the rich text editor or the plain text editor. I released the library to the community, and be necessity it is licensed under the GPL.
Along the way, others have used the library in their plugins. One of the people that has used the library is Oliver Seidel for his cforms plugin. Unfortunately, Oliver has come under fire recently because someone pointed out that his plugin is not GPL-licensed, and as such has rightfully been removed from the WordPress.org plugin repository.
