ICHCnet

ICHCnet (formerly Clarkecorp NINet and NINet) is an ISP based in Northern Ireland, operated by the Clarke family and founded in 1991. It operates the D root name server and a webmail service, among other services. It is also the licensed Cogentsat and Cogent Fibre distributor in the British Isles as a whole, and owns Demon Internet in the mainland UK.

Chess server
The Northern Ireland Internet Chess Server is an online chess, checkers, and shogi server and application located at. It also offers several chess variants, as well as other abstract strategy games.