»Free HL Iconlib - A free and opensource Java library for extracting icons and GIF-images from the hotline.dat file of the Hotline software provided by Hotsprings, Inc..
»GLoarbLine Suite - Open source Hotline client and server applications for various operating systems derived from OpenLine which was one of the first free Hotline clones..
»HotlineX - Free set of software using the Hotline protocols, providing Hotline application suites that can run on GNU/Linux, OS X and Unix. Provides release information for the base HXD products as well as mHXD..
»Net-Hotline - A set of modules for utilizing the Hotline protocol in a Perl environment..
»SourceForge.net: PhareRouge - Open source, GNU/Linux-compatible version of the now unavailable Red Light Variety Alpha software, a Hotline protocol client and server with English and Japanese language support..
»SourceForge.net: PhareRouge GL - An improved version with additional features making it compatible with GLoarbLine server and 1.9x servers..