Overlook Fing (Free)
If you do any networking work, this is a must-have app. It can do TCP port scanning, pinging, traceroute, and DNS lookups on a network via Wi-Fi.
It also shows the network details (SSID, IP details, and speed) of your current Wi-Fi connection.
You can see and export the details (MAC address, IP and vendor) for each computer or device detected on the network, which are customizable
with a name, icon, or notes. You can also perform a port scan or ping a particular computer or device. It can also launch third-party client apps for
SSH, Telnet, FTP, FTPS, SFTP, SCP, HTTP, Secure-HTTP, and SMB.