When I announced that we were closing down Popfly, one of the biggest questions I got was how users could save their content. For the most part, that's not really feasible, but over at Coding4Fun, Dan has posted a link to a tool that was written by two folks from the former Popfly team (Ben and Adam) that enables you to download and run your Popfly games locally. All caveats about software apply, but this may help many folks.