While it’s sad that Popfly is going away, it’s cool that the Popfly team put out (an unsupported) tool, Popfly Game Downloader, that enables you to download and run Popfly games offline.
- Step-by-Step instructions on Coding4Fun
- Project on MSDN Code Gallery
You can download any shared games, whether they’re your games or community built games.
Kudos to Ben Anderson and Adam Nathan for building the tool :)