Statistical data visualization in Python
A cross-platform statistical package for econometric analysis
Framework & GUI for Bayes Nets and other probabilistic models.
C++ Statistical ToolKit
OpenM++: open source microsimulation platform
A web-based minimisation service
A Stata plugin for connecting Stata with other software
jAgg - Java Aggregation Operations
Realtime bigdata tool for bit strings up to 2^63 based on AVL forest
Powerful Calculus Environment and Matrices Handling Engine
A simple programmable spreadsheet for learning statistics.
Library for optimization using a genetic algorithm or particle swarms
neural network implementation in java