I use a lot of different software. But the main one is PokerTableScan which takes your pokertracker database and runs the names of the people at all the tables and gives you table averages. I choose the loosest table in VPIP that I have the most data on the players. PokeraceHud has a similar feature but that can only find you the VPIP of 12 tables at once instead of every table at the limit.

Picking tables with a couple x-loose fish improves your winrate dramatically.