Quantral
I'm helping my wife build https://quantral.com - initially we put it together to track stock sentiment/crowd wisdom on social networks for our own investments. This is something I was previously doing manually every morning while having breakfast. I couldn't find a similar project to satisfy my needs for discovering hot stocks and the track records of people who mentioned those stocks on finx and /r/wsb. We are now planning to add congressional trading as another data source.