A guy on IRC told me he uses this for everything. Seems like a pretty cool tool.
http://www.cs.waikato.ac.nz/ml/weka/
"Weka is a collection of machine learning algorithms for data mining tasks"
@data
sunny,85,85,FALSE,no
sunny,80,90,TRUE,no
overcast,83,86,FALSE,yes
rainy,70,96,FALSE,yes
For example, with this data, it does stuff with it?