If you are interested in developing applications using machine learning algorithms but you are tired of coding the Learning algorithms then here is All-in-one formula for you -WEKA.Weka is collection of machine learning algorithms. It does everything for you, you are responsible for the just data and feature extraction, keep everything else for the Weka. It really simplifies your work and saves time.It also does evaluation of the built model on the same or provided data as per your settings. You can download it form here. Here you will get documentation and all the needed information regarding using the weka. Weka provides number of ML algorithms like ANN, SMO, Decision Trees etc. So experience the Difference!