You can find it on my side (see signatur below). It has a detailed manual and there are also some tutorials.
The free version supports 4 connections, but you aren't allowed to publish commercial games with it. If you want to create commercial games with it or need more connections, you have to purchase a full version.
ANet - A stable and secure network plugin with multi-zone, unlimited players, voip, server-list features,... (for A7/A8)!
get free version