Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
Kiwix - Kiwix enables you to have the whole Wikipedia at hand wherever you go!
Sutori - Sutori is the easiest way to create an interactive story collaboratively.
Oppia - Oppia is a free, open-source learning platform.
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."