Userspace network stacks (like this[1]) on top of things like netmap[2] are also very cool. [1]: http://conferences.sigcomm.org/hotnets/2013/papers/hotnets-f

Userspace network stacks (like this[1]) on top of things like netmap[2] are also very cool. [1]: http://conferences.sigcomm.org/hotnets/2013/papers/hotnets-final43.pdf [2]: http://info.iet.unipi.it/~luigi/netmap/