Sysinternals Networking Utilities
Active Directory Explorer is an advanced Active Directory (AD) viewer and editor.
AD Insight is an LDAP (Light-weight Directory Access Protocol) real-time monitoring tool aimed at troubleshooting Active Directory client applications.
Undelete Server 2003 Active Directory objects.
Displays the named pipes on your system, including the number of maximum instances and active instances for each pipe.
See what files are opened remotely.
Measures network performance.
The PsTools suite includes command-line utilities for listing the processes running on local or remote computers, running processes remotely, rebooting computers, dumping event logs, and more.
Scan file shares on your network and view their security settings to close security holes.
Active socket command-line viewer.
See who owns an Internet address.