adv-samba is a PHP class to batch audit SAMBA resources on remote hosts or large LANs. It's a very handy tool during network audits. For example, imagine a LAN with 500 workstations. You want to find any illegal MP3s on company machines. With this tool, you recursively dump the share directory structure. It works with Active Directory authentication too.
Multi Threaded TCP Port Scanner allows you to scan 65535 TCP ports on an IP address. You can specify how many threads to run and the timeout. Furthermore, it will tell you the MAC address of the target and the services that are running. You can scan IP addresses on your network and find out which open ports you have.