- webpack - build tool like grunt, gulp but it only uses a single json blob
- redux-devtools - lets you time travel in chrome through your store
- yarn - faster, lockfile npm package manager
- react-router v4
- flow - static type checking for javascript at transpile time
- redux observables - async side affect manager
This is just really cool to me, service workers allow mobile websites to act like native offline apps with push notifications, update cycles, the works. Basically eventually I think progressive web apps will replace mobile apps that aren't video games or intensely graphical