Popfly is the fun and easy way to build and share mashups, gadgets, and Web pages. It’s made up of online visual tools for building Web pages and mashups and a social network where you can host, share, rate, comment and even remix creations from other Popfly users.
Availability: Public Beta
Storage Limit: 25MB per user
System Requirements: Microsoft Silverlight 1.0
Browser Support: Mozilla Firefox 2.0, Internet Explorer 6.0 or higher
Release notes at http://www.popfly.com/Overview/ReleaseNotes.aspx