Machine Learning y Data Mining con software libre en java

Weka es un framework libre en java para minería de datos, con una GUI y soporte comercial.

Weka 3 - Data Mining with Open Source Machine Learning Software in Java
http://www.pentaho.com/products/data_mining/

Weka 3: Data Mining Software in Java

Weka is a collection of machine learning algorithms for data mining tasks. The algorithms can either be applied directly to a dataset or called from your own Java code. Weka contains tools for data pre-processing, classification, regression, clustering, association rules, and visualization. It is also well-suited for developing new machine learning schemes.

Screenshots

		Knowledge Explorer lets you explore your data and prepare it for data mining. Click on image to zoom.
		Graphical visualization tools show you patterns in the data and help you fine-tune your model. Click on image to zoom.
		KnowledgeFlow shows you the flow of data through the system and the processes that it goes through