is there no serverless lan messeger?????plzzzzzzz

hello genius people,
i have seen the forum it is outclass and complete
any one can get every thing from here please help me

I need to design a LAN messenger who can send and accept messages from multiple pc's please help yarrr plzzzzzzzzzzzz plzzzzzz plzzzzzzz
it is my final project plzzzzzzzzzz:thumb::afrog::sick::):D:bigyello:

thxxxxxxxxxx in advance