I wasn't sure where to put this so I figured I'd put it here since you'd use it to build new games.
Lumberyard is
"made up of proven technology from CryEngine, AWS, Twitch, and Double Helix" and is being developed by Amazon. It is currently:
a:) in beta
b:) it is also...
Quote:
...free, including full source code. You can deeply customize Lumberyard for your team, vision, and project today, and for future projects in years to come. There are no seat fees, subscription fees, or requirements to share revenue. You only pay for the AWS services you choose to use.
c:) has about 20gb+ of assets and plugins (depending on what your fancy is) for download for free.
Official link is above and below.
Amazon Lumberyard