Which of the following is a free and open-source content collaboration framework based on JavaScript that enables existing CMSs and LMSs to create richer content?

H5P is a free, open-source, JavaScript-based framework that lets existing CMSs and LMSs build richer interactive content.

Plotagon is a tool for creating animated story videos, not a content framework.

Mindmeister is an online mind-mapping tool for brainstorming ideas.

Labster provides virtual science laboratory simulations.

H5P content such as quizzes and interactive video embeds directly into platforms like Moodle and WordPress.

H5P stands for HTML5 Package.