A free multithreaded IP, SNMP and NetBIOS scanner. Both system administrators and users can use this software. It pings computers, scans for listening TCP ports and shows what types of resources are shared on a network (including system and hidden). (Freeware) ipsharessharedresourcesscannerhiddensnmp
AATools is a multithreaded network diagnostic toos for network administrators and security professionals. Its purpose is to accumulate data pertaining to network status and availability, using all of the latest development tools in network research. (Shareware) aatoolsportscannerregistrycleanerproxyanalyzeremailverifiernetworkmonitor
Tail4Win is used to monitor changes to files and display the changed lines in realtime.
It is very usefull for monitoring log files of applications - e.g. Apache's logs or IIS's logs.
It can capture and display OutputDebugString / TRACE. (Shareware) tailwindows tail wintail unix tailtailing