Playgrounds help you interactively develop code, and code generators write the code for you. Here’s a selection of the best.
Paw
Understanding and using OriginStamp’s RESTful API, so that you can create and check timestamps programmatically.
Almost every app that you run – under OS X or iOS – which communicates with a remote web server will use RESTful APIs somewhere along the line.
The Eclectic Light Company 