[beagle3]

Libuv supports windows and in some ways only exists because windows support is needed; on Unix/Linux where Node started, libev was sufficient; libuv was created to facilitate the windows port of node - though it is now standing in its own right.

[piscisaureus]

I know - I am one of the authors of libuv. However libuv is pretty big and imposes its own asynchronous i/o model onto your application.

Later I discovered that it is possible to do efficient epoll emulation on windows so then I wrote wepoll. With it you can just stick to the good ol' epoll/kqueue model and still support windows.