Tracker Suite - A comprehensive Lotus Notes help desk solution, which offers FAQ and knowledge base functionality. - http://www.trackersuite.com/frame_help_desk_software.html
Velocity Integrations Software - A comprehensive Lotus Notes service desk and problem management solution. - http://www.velocityintegrations.com
extendedReach Software - Help desk and related solutions based upon IBM's Lotus Domino platform. - http://www.ersoftware.com
GeoCom Helpdesk - Compact Lotus Domino based helpdesk software with customizable scheduler for user and customer support. - http://www.geocom.de/geocom/page/uk/hd.html