
Lansweeper
Spiceworks
Network Lights
FreeMeter
trafficWatcher
TrafficMonitor
Snipe-IT
NetBalancer
KIX
osTicket
Zendesk
Freshdesk
Zammad
FreeScout
ProProfs Help Desk
LiveAgent
Lansweeper
KIXSpiceworks - Spiceworks bundles network monitoring, helpdesk, UPS power management, PC inventory tools, an online community, and much more for free
osTicket - osTicket is a widely-used open source support ticket system.
Network Lights - Network Lights is a Windows program, which blinks keyboard LEDs (Light Emitting Diode) indicating outgoing and incoming network packets on network interface.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community