AngularJS Learning Playground ( with Twitter bootstrap, Google maps API, TDD using Karma runner )
Interactive Playground / Literate Programming for Scala —
Welcome for discussing GreenGrass API Playground — https://github.com/Yxine/GreenGrassAPI
Playground for Mimosa 2.0, Marionette Apps with node-orm2 + Semantic UI support (coming)
Dielectric is a playground for coming up with a more functional way of interacting with Spark.