Edit Any Webpage - Edit any site on the fly - bookmarklet
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
Iteration X - Iteration X allows teams to annotate and edit any live website or web app directly in Chrome.
Vivoom - Make Every Video Look Better
EditMode - Update website texts in real-time and get a sharable link.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.