Magic NetTrace is a versatile program that combines ping, WHOIS and traceroute functions into one easy-to-use tool. It lets you identify the source of connectivity problems, track down spammers.
AthTek IP Scanner is a collection of tools to provide you with information about the networks. It's both IP Scanner and MAC Scanner for web monitoring. Even beginner can use this Lan software to ping network, scan IP or MAC for a overview of network.
PA Server Monitor is a Windows service that monitors the health and availability of Windows servers, network services (on Windows, Linux and other operating systems), and devices. No agents are needed to monitor remote servers. Rich reporting too.