Server

Codebox Tracker
Alternative to the Hotline Tracker daemon software supplied by Hotline Communications. Provides many features not available in the original software, including mirroring, HTML reports, pseudo-server entries, and rule-based filtering.
http://codebox.no-ip.net/controller?page=hltracker

Hotline Connect Admin Tool
Tool that analyzes and displays the contents of Hotline server log files. It also scans the Users directory and lists basic info on user accounts.
http://detrave.net/nblume/hcadmintool/

Hotline NetStrangler
Tool to control and limit the network bandwidth used by a Hotline server, or a tool to control uploads on a Hotline server. Programmed in Java.
http://hotlinenetstrangler.poueck.com/

hotwired
A Hotline server for Unix-like operating systems that was abandoned by its creator, currently pending further development.
http://sourceforge.net/projects/hotwired/

SilverWing Server
Server application for the Be Operating System. Versions are available for the x86 and PPC hardware platforms.
http://hp.vector.co.jp/authors/VA013465/silverwing-server/

SynHXD
Client/server suite for Linux/Unix operating systems. Includes shxd, a popular Hotline daemon that is integrated into the mhxd application suite.
http://synhxd.sourceforge.net/

Wired Server
Server daemon for Unix/Linux and Mac OS X that supports the Wired/SSL-TLS protocol as well as the Hotline protocol. The Mac OS X version includes a preferences panel.
http://www.zankasoftware.com/wired/server/