Images-90 One of the most used things in homes, business and small offices (other than the internet) is routers. Although routers are inexpensive, you can build and configure a router for free, if you have the necessary parts. Lets start off with the requirements needed for this project: i386, or better motherboard + processor, 2 PCI or ISA NICS, Floppy Drive, Harddrive (optional), 8 MB of RAM, Freesco floppy disk Link.