Choice of Machine Learning Platform [closed]

Question

I have a data set of users and their loan repayment metrics (how long they took, how many installments etc). Now I want to analyse a user's past loan history and say, "If we loan them X they will most likely repay over Y installments, over Z days"

Here is my take

1. The algorithm is a Clustering algorithm to group all users according to their repayment habits
2. I want to use a SOM or K-Means

So my question is, what platforms are good for this? I have had a look at Mahout so far.

Answer 1

Well worth taking a look at Weka - it's a reasonably mature open source toolkit with lots of machine learning algorithms, clustering included.

Answer 2

RapidMiner - community edition available for free - easy to use - nice visualizations

http://rapid-i.com/content/view/181/190/