HLDNS - Dynamic domain name redirection service catered towards Hotline servers. - http://www.hldns.com/
Maclavista - Web based hotline tracking - locate a server, and search. - http://tracker.staticusers.net/
Tokyo Hotline - Hotline news and information site written in Japanese. - http://hotline.s28.xrea.com/
Hotline Mailing List Archives - Archive of the Hotline Mailing List from the early days of Hotline development. - http://www.mia.net/domains/hotline/
Avaraline - Protocol that extends the original Hotline protocol, resulting in new features like peer-to-peer file sharing and full user icon arbitration without sacrificing backwards compatibility. - http://www.avaraline.net/
Trackerfrog Hotline Information - Trackerfrog helps people with NetMeeting ILS servers and Hotline p2p software. - http://www.trackerfrog.com
Hotline Protocol - Official listing for versions of the Hotline protocol released under the GNU Public License by Hotsprings, Inc. through the OpenSprings project. - http://sourceforge.net/project/showfiles.php?group_id=77706&package_id=78748
"Hotline's Civil War" - Salon.com 21st feature that outlines the legal battles that have ensued between Hotline Communications and the inventor of the Hotline protocol, Adam Hinkley. - http://archive.salon.com/21st/feature/1999/02/25feature.html
"Hotline to the Underground" - Salon.com 21st feature that explores the culture of the Hotline community. - http://archive.salon.com/21st/feature/1999/02/24feature.html
Tracker-Tracker for Hotline - A web site that offers an up-to-date list of Hotline trackers with their status and the number of servers they are tracking, a hotline server description search engine and a hotline file search engine. - http://hotline.tracker-tracker.com/
VivaHX - News, features, guides and reviews related to Hotline. - http://www.vivahx.com/