devmarks.io - Bookmarking for Developers
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
Little Star - Efficiently and easily manage your GitHub stars
Preceden - Preceden makes it easy to build simple, powerful timelines