2 years ago: I finished a law degree at university (Oxford). I liked law but I preferred programming and so I worked as a programmer for the past two years.

Fast forward to today: I want to find a way to combine my knowledge of programming with law. The problem is I don't know what to build. Now this forum is full of bright people so I hope you guys can help me come up with good ideas. And so I ask:

If you could have me build any website / application to help you in your legal studies, what would it be? What would make your life easier?

It could be something to research cases, to share notes, to track applications, to find articles, to discuss certain topics... whatever. I'm all ears.