Game Making Toolkit Voxel.js
Originally created by two non-game developers Voxel.js is an easy and fun toolkit to create your very own Minecraft like games for a web browser. Now after being released as open source, it is actively maintained by a community of over 100 contributors who make it better every day.
Instead of creating one massive framework the developers opted to go with several modular components that can be managed with the package manager in Node.js. The components allow you to pick out just what you need to create the game and no extra fluff. This keeps your games mean and lean as you create them with Voxel.js. If you want to create your own Minecraft inspired voxel games, head on over here to download it for yourself.