DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
Padlet - Visual boards for organizing anything.
Zeal - Zeal is an API Documentation Browser.
Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Popplet - Popplet is the simplest application to capture and organize your idea.