I am a big fan of Crafty. Glad to see it on the list I've used it successfully in a few projects its a great 'get shit done' game framework. Has an interesting composition inheritance model.
That info is in the "More Details" section. With that said, do you still think it should go in the main table? Was trying to keep it from being too cluttered.
It might be good to include brief license information in the cost column -- for example: "free (MIT)". There's probably at least vertical space in the column for that along with a price, and it's conceptually related, particularly for licenses that carry responsibilties with them.
I can't speak on behalf of everyone, but the license it's under is a deciding factor for me when looking at engines and libraries. It's definitely something I'd love to see at a first glance.
I really liked playing around with Quintus. It's one of the newest, and feels the most like modern JavaScript development. Almost like Backbone for games.
i didnt know much about construct 2, but the screenshots/feature sets make it look quite nice. Can you write a bit about what features, limitations and other facets that's in construct 2?