yeap, this week indie humble bundle is making a sale to support open source game engines, which were used for the making of the games that are being sold
humblebundle.com/weekly
youtube.com/watch?v=2pkj_rq5JEM
its interesting to see how open source is becoming a sort of a good publicity for software
In other news a developer open sourced his engine and nobody heard about it because the only place you can download it and was announced is a forum thread
percsich.hu/tgmforum/index.php?topic=620.0
Here is a man who doesnt know how to go open source 
Tululoo is a pretty decent engine that compiles to html5. It is very similar to game maker. The syntax is almost the same in fact