Simple 3 layer backpropagation neural network w/3 demo applications (point classifier, XOR, 0-9 recognition)
Also available at http://backprop1.sourceforge.net/
Update: 12 April 2014
BackProp1 now uses gradle.
Original BackProp1 on eclipse moved to "original" branch.
"gradle runDemo1" generates training set and trains to solve point classification for the equation "y = -5x+2" (you can view the training set w/gnuplot by using demo1/src/main/script/gnuplot1.dem)
There is no gradle support for demo2, an XOR demo.
"gradle runDemo3" is an interactive digit recognizer. It trains for the digits 0 through 9, and then allows one to change the pattern values then submit for classification.