In Moodle 2.4 and later, the tinymce editor can be extended and replaced by new plugins.
TinyMCE: Cloze Editor
An interface that integrates with Moodles existing HTML editor (HTMLArea in 1.9 and TinyMCE in 2.x) to support teachers in creating CLOZE (Embedded answers) questions in the GIFT syntax. It will also read and edit existing CLOZE items.
TinyMCE: PoodLL Anywhere
PoodLL Anywhere for TinyMCE allows the user to record audio and video or draw pictures, or snap pictures, directly into forum posts, assignment descriptions, page resource content, question descriptions, question responses and other areas.