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/