Webring

"WebRing was a free service for people with related sites to automatically trade links, written by co-founder Sage (it’s not just me and Dallas around here!) back in 1994, while he was still in high school!" - http://blog.dreamhost.com/2009/04/24/theyre-internet-history/ (http://blog.dreamhost.com/2009/04/24/theyre-internet-history/)