I've been using Scirra's Construct 2 (http://www.scirra.com/construct2) and like it so far. I do programming for my day job but I like how this abstracts things that I need to do to make a game like tying art assets to game rules so I can focus on the game design and less time on learning lots of subsystems.
It takes care of most of the heavy lifting when developing games for HTML5, but it still has a very open and powerful scripting language (unlike something like gamesalad which is more like using pre-built blocks).