Wikipedia
AppJet
AppJet was a website that let users create web based applications in a client web browser, with no other client software. AppJet was founded by 3 MIT graduates, 2 of whom were engineers at Google before starting AppJet. They launched their initial public beta on December 12, 2007, allowing anyone to create a web app.
AppJet received funding from Y Combinator in summer, 2007.
The project closed on 1 July 2009 to focus attention on the EtherPad product.
Appjet was acquired by Google on December 4, 2009 for an undisclosed amount.
JGate is a cloud-based service (in Beta and free as of Jan 2011) that allows AppJet applications to be run.