Tunnge and Evolve have closed.
There is multiple programs to make 'direct connections', but 1 of verry meaningful functionalities that such software should have is a list of online servers/rooms, to play not only with known friends.
it present only in pLan (.. OpenVpn) and gameRanger, while gameRanger currently has disadvantages like game auto{starting/closing}, rooms auto-locking, players limit equal to 1 ingame-server's max, and strict game selection, pLan needs players a lot, please  joing us to play together.