Flapjax is "designed around the demands of modern client-based Web applications," according to the Flapjax Web site, where the technology is available under a BSD licence.
"It's a very generous BSD license. We want people to use it," said Flapjax lead developer Shriram Krishnamurthi, an associate professor of computer science at Brown University.
Flapjax, Krishnamurthi said, "provides a better programming language for writing the client application, but it also makes it easier to communicate and store data on a server." The Flapjax team is providing a server to host data and applications; users also can host their own applications or prototype on the Flapjax server and then migrate to their own hardware. Flapjax technology is accessible here.
Flapjax is envisioned as a solution for developing rich Internet applications such as front ends for e-commerce systems. It runs on traditional Web browsers and requires no plug-ins or additional downloads.
Flapjax also features event-driven, reactive evaluation, which involves a programming model for writing client-side applications that saves developers from dealing with "bookkeeping" details such as data passing, Krishnamurthi said. A templating syntax in Flapjax enables insertion of Flapjax code onto an HTML page.
Access control is provided for shared data.