AnimationMaker - Create animated presentations and export them to a video file, animated gif or HTML based on SVG...
CKEditor - Real-time collaborative future-ready rich text editor
Stickman & Elemento - The Easy Way To Animate
Aloha Editor - Aloha Editor is an HTML5 WYSIWYG Editor that gives you a total new experience when editing.
CrossBrowdy - Open-source JavaScript framework to create cross-platform and hybrid game engines, games, emulators, multimedia libraries and apps
AlloyEditor - Modern WYSIWYG editor built with a sleek React UI on top of CKEditor