SQLREST enables access to a relational database as RESTful Web Service. Entities can be queried, created and modified using the HTTP methods GET, POST, PUT and DELETE.
This is not a review of the software itself but the provided live demo. Props to the developer for exposing to the net a simple live REST server demo! This alone is such a valuable resource for newbies trying to wrap their head around the RESTful way of accessing web services. I have not explored the demo in depth yet, but from my initial probing, it appears to indeed follow REST best practices for the API.