Higher Intellect - Presents the server that hosts open source and abandonware software as well as other files that seem important to its users. Also offers a tracker to find other Hotline servers.

Hotline Protocol - Official listing for versions of the Hotline protocol released under the GNU Public License by Hotsprings, Inc. through the OpenSprings project.

Major Mac Backup - Offers archiving and backup services on Hotline, Carracho, and KDX servers, with a particular focus on Macintosh users.

Naibat.com: Hotline File Sharing - Hosts a tracker, several user guides in PDF format, old client and server software for historical purposes and a collection of useful links.

VivaHX - News, features, guides and reviews related to Hotline.

Wikipedia.org: Hotline Communications - Presents the now defunct company that created the Hotline Connect protocol, their software suit, its history, and its successors.

Filesharefreak.com: Hotline - a P2P Pioneer Still Lives On - Presents the history and describes the current state of the Hotline scene, also explains how to get started with this BBS system. (July 10, 2008)

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. (February 25, 1999)

Hotline to the Underground - Salon.com 21st feature that explores the culture of the Hotline community. (February 24, 1999)