RapidMiner (Community edition) is a data mining software. It was formerly known as "YALE". You can use RapidMiner as a stand-alone application for data analysis, or integrate it as a data-mining engine into your own products. Features:

Data integration, analytical ETL, data analysis and reporting into a single suite Powerful yet intuitive GUI (Graphical User Interface) for the design of analytical processes Repository for process, data and metadata management The only solution with metadata transformation: Forget trial and error and inspect results already at design time The only solution that supports on-the-fly error detection and quick fixes Complete and flexible: Hundreds of methods for data integration, data transformation, modeling and visualization

License info: RapidMiner has a free version that anyone can use. The free license is limited to 10,000 rows of data and use of only 1 processor; otherwise it's full-featured. Users can get an additional 10,000 rows by referring a friend. The paid license of RapidMiner starts at $2500/year and allows unlimited data and processors. There is an Academic License program for those in academia (https://rapidminer.com/educational-program/).