Room Escape Maker (Beta)
It's time to put your escape games where your mouth is!... or... something. Currently available in beta, DoctorFou's Room Escape Maker is exactly what it says on the tin... a free online tool that allows you to make and share escape games (which requires free registration with an e-mail address), or play those created by others (no registration required)! Though you should watch/play the tutorial, it's fairly easy to get the hang of things, and the hardest part might be waiting a long time (upwards of eight hours or more in our case) for your finished product to be approved for the site.
At the moment, the tools at your disposal are fairly basic, and the limitations imposed on object count and the like mean creating your grand elaborate escape opus starring Lyra Heartstring, GLaDOS, and an elaborate singalong puzzle sequence will have to wait. Fortunately, you can help that change by submitting everything from suggestions to images to be uploaded for use in the toolset. This is definitely a case where the potential success can come entirely down to the community growing around it, but potential it's got in spades. Besides, it's a free way to help hone your ability to ensnare helpless people in locked rooms filled with diabolical mechanisms. Every fledgeling supervillain/Eli Roth film antagonist has to start somewhere.