The 1Q KNIME newsletter is out. Discussion of text mining, the Feb UGM and Tips and Tricks.
KNIME (Konstanz Information Miner) is a user-friendly and comprehensive open-source data integration, processing, analysis, and exploration platform.
There is a KNIME tutorial here.
From the KNIME newsletter
“…good news for our Mac Users! We have just released KNIME 2.5.4 which fixes issues caused by the latest Apple update of the Java environment. We are grateful to the very active KNIME community which has helped to identify and fix this problem.”
KNIME Desktop 2.5.4 can be downloaded from the download page (http://www.knime.org/download) or you can upgrade your existing KNIME installation by using the built-in update functionality available in the "File" menu
There is also a KNIME tutorial here