- Sebastian Lamblas talk on caching in HTTP. The guy knows his stuff and he can explain it too. On the surface of things caching in HTTP may sound like small topic, but it turns out there is more to it than meets the eye. Useful stuff for anybody building web apps (be it internal facing or public facing) with any significant load.
- Don Symes talk on F# type providers. Type providers are a cool concept. If you haven't checked them out you should, and this talk is a good place to start, although you probably need to know basic F# to get the most out of it.
- Jonas Winje, Einar W. Høst and Bjørn Einar Bjartnes talk on drones and Rx. This was a really fun talk packed with breakneck demos stacking Node.js, Rx, Roslyn, Lisp, Nancy, a drone and probably a few other things I've forgotten on top of each other. Mixed in with all the fun and games where some good sound technical content especially around reactive programming.
There were other good talks, but these are the ones that mostly stuck in my mind. I'd recommend watching them when the videos come out.