PRTG is an easy to use Windows solution for network/bandwidth usage monitoring. Supports SNMP, packet sniffing and netflow to create live readings with periodical trend data to help optimize the efficiency of routers, servers and other network components. PRTG is available as both Freeware and several different commercial editions, offering various levels of monitoring for multiple network devices and advanced features suitable for corporate use.
Easy to use bandwidth/network usage monitor for Windows. 
CRM software for mid-size business. 
A clean registry speeds up your computer! 
Advanced spyware, adware and malware remover