Timeline JS - Beautifully crafted timelines based on Google Spreadsheets that are easy, and intuitive to use.
Preceden - Preceden makes it easy to build simple, powerful timelines
Tiki-Toki - Tiki-Toki is web-based timeline software for creating beautiful interactive timelines that you can share on the web.
Time.Graphics - Time.Graphics is a timeline and free of charge online service for creating infographics.
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
GitHub Student Developer Pack - The best developer tools, free for students.