PlayCanvas goes open source

I analyzed their JS math library (2013) and was pleasantly surprised (optimized, lean object design).<p>Love what PlayCanvas is doing. They seem committed to the community and their people.

Seems like another WebGL game engine was open sourced recently: <a href="http://news.turbulenz.com/post/49430669886/turbulenz-engine-goes-open-source" rel="nofollow">http:&#x2F;&#x2F;news.turbulenz.com&#x2F;post&#x2F;49430669886&#x2F;turbulenz-engine-...</a>

Anyone able to compare this with Phaser (<a href="http://phaser.io/" rel="nofollow">http:&#x2F;&#x2F;phaser.io&#x2F;</a>)?

Does anyone have experience with using this versus THREE.js?

Any JavaScript engine is always open source. I mean, it is not illegal to view page sources?