The official Retsly PHP SDK by Retsly calls the Retsly API which provides access to Retsly's real state backend. It can be used to build robust realtime applications without a database. It requires PHP 5.4+.
A number of companies are making a push to move traditional desktop applications into the cloud. Programmers have not been left out of this revolution, with several sites offering IDEs in a web browser. Here are 5 online IDEs.
In an agile world where the majority of application development is now iterative the testing of applications has never been more important. After all, the impact of single undiscovered error can now be easily compounded through multiple iterations of an application; making it that much harder and expensive to discover and fix later on.