Alcamy - Free, open self-learning platform. Learn & teach anything.
genei.io - AI-generated summaries for any article or research paper.
EduDo - EduDo is a video discussion platform
RadaeePDF - RadaeePDF is a library for developers who want to render, manipulate, annotate PDF files on Android, iOS and Windows.
Golden - Mapping all human knowledge
Anvil PDF Filling API - The easiest way to programmatically populate any PDF