Edit Any Webpage - Edit any site on the fly - bookmarklet
Preceden - Preceden makes it easy to build simple, powerful timelines
Iteration X - Iteration X allows teams to annotate and edit any live website or web app directly in Chrome.
Tiki-Toki - Tiki-Toki is web-based timeline software for creating beautiful interactive timelines that you can share on the web.
EditMode - Update website texts in real-time and get a sharable link.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.