Open Source Software

Financial Open Source Software

Itrade Project:
Http://itrade.sourceforge.net/index.htm
Qtstalker–commodity and stock market charting and Technical analysis:
http://qtstalker.sourceforge.net/
Optoin Viewer:
Http://sourceforge.net/projects/option
Advance Stock Tracker:
http://advancedstocktracker.org/component/option,com_frontpage/Itemid,1/
Auge is an easy-to-use financial portfolio management pplication:
http://auge.sourceforge.net/
Open Java Trading System:
http://ojts.sourceforge.net/
Oropuro trading Software (Italian):
Http://www.oropuro.org/en-index.htm
Stock Maniac:
http://stockmaniac.sourceforge.net/index.php?option=com_content&task=view&id=26&Itemid=82

Data Mining Open Source Software

WEKA
http://www.cs.waikato.ac.nz/ml/weka/
PENTAHO
http://www.pentaho.com/
SVMLIGHT
http://svmlight.joachims.org/
lots of free and non-free Data Mining software
http:// www.kdnuggets.com/software/suites.html

Optimization software
Coin-or
Http://www.coin-or.org/projects.html

This article from "It Technology Learning and communication" blog, declined reprint!

Open Source Software