i need a router software coneect two PCs withe network interface card????
Look router is basically route the network. There is no any router software which is help you to connect 2 p.c.
you can connect it by normally lan cable, and configure private i.p on both the system. you can used it normally, else if you would like to have connect more then 2 system, in that case you can buy any second hand d-link switch or a hub.