The uHunt PHP Client Library by Kaspars allows developers to integrate the ability to retrieve information from UVa's online judge into their PHP applications. This library is offered under the MIT License.
Google Moderator is the sort of tool that deserves an API. The platform to collect audience ideas and gauge interest is used widely internally at Google, as well as being available to anyone. It is no longer limited to web browser use, as it now has an API (our Google Moderator profile).
Postman is a HTTP client for testing web services. Created by Abhinav Asthana, Postman makes it possible for developers to test, develop and document APIs easily and efficiently by allowing users to put together simple and complex HTTP requests quickly. This article provides a review of Postman.