Robot Framework is an open source test automation framework for acceptance testing and acceptance test-driven development. It follows different test case styles – keyword driven, behaviour-driven and data-driven for writing test cases. This feature makes it very easy to understand. Test cases are written using keyword style in a tabular format. Robot Framework provides good support for external libraries, tools that are open source and can be used for automation. The most popular library used with Robot Framework is Selenium Library used for web development & UI testing.
Reader friendly intro for getting started with robot framework
Short, condensed basic information needed for getting started using robot framework. I found it much quicker and easier than hunting around official documentation. It was certainly well worth the reasonable price.