Open Port Scanner tool in This tool can discover open TCP ports and display information about known services possibly running on the machine. Unlike the Network Service Scanner, this tool only checks if the given port is open.
Service Scanner tool from The tool can discover 65 ( and well known services running on machines in the given network. NetCrunch Tools then sends relevant requests for each service and validates received responses.
Scanner tool in Ping Scanner enables you to scan a range of IP addresses periodically. This way you will know which addresses are in use. Additionally, NetCrunch Tools will perform reverse lookups for you.