APRIL-ANN toolkit (A Pattern Recognizer In Lua with ANNs). This toolkit incorporates ANN algorithms (as dropout, stacked denoising auto-encoders, convolutional NNs), with other pattern recognition methods as HMMs among others. Additionally, in experimental stage, it is possible to perform automatic differentiation, for advanced ML research.
matBroadcastin C++ (it is slow, but can be useful to broadcast operations over different shaped matrices).stats.bootrelated functions.accumulatedargument in C++matSumoperation.