Digitata is described as 's is a digital tree, a sapling to give technology to children of the Digital Generation. Under Open Hardware licensing by Open_Sailing and openet.org'. There are more than 10 alternatives to Digitata for a variety of platforms, including Linux, Mac, Windows, BSD and Apple TV. The best alternative is GNUnet, which is both free and Open Source. Other great apps like Digitata are cjdns (Free, Open Source), LibreMesh (Free), telehash (Free, Open Source) and MUTE (Free, Open Source).
SMesh is a seamless wireless mesh network being developed by the Distributed System and Networks Lab at Johns Hopkins University. It provides peer-to-peer connectivity, Internet connectivity, and fast handoff to mobile clients across the mesh.