TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
inFlow Inventory - inFlow Inventory is inventory management software for small businesses.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
Skyware Inventory - Web-based Inventory Management.