-any software available?
-any other tips?
I am not busy with it but there is a program called tabtrader, you can follow the price difference in several exchanges. Also working with the API key will make arbitrage very easy but be careful with it.
-any recommended exchange to use with Bitstamp?
If you want to be busy with arbitrage, you should register many exchanges as you can. Because as you know, arbitrage takes advantage of the price difference.
Besides that, I think arbitration has a very big risk, especially in the transaction period. the longer the transaction is done, the less likely we are to get a profit because the market price can even change every minute, even seconds.