TCP Socket is a TCP/IP stack implementation. The core acts as a server, allowing a remote client to establish a bidirectional TCP socket connection directly to logic within your FPGA.
TCP Socket is implemented in C, and is compiled into synthesisable Verilog using the Chips development environment (included). A precompiled Verilog module precompiled/server.v is also provided to get you up and running. For more details check out TCPIP.pdf.
A simple web-app demo for the Digilent Atlys Spartan 6 development card is provided. This includes everything you need to get up and running, including the Ethernet MAC. If you want to give it a try, why not use the precompiled .bit file. For more details check out README.pdf.