arpscan

For when your laptop is on the other side of the room and you want to know its ip address.

Windows only, wraps SendArp()

screenshot

C:\>arpscan.exe

Interface List                                                  Address                         Status      Scan Action
=======================================================================================================================
Local Area Connection                                           192.168.1.2                     Up          Scan
Loopback Pseudo-Interface 1                                     ::1                             Up          Skip
Loopback Pseudo-Interface 1                                     127.0.0.1                       Up          Skip
isatap.{e93582d2-c744-487f-a0b3-ea0dd44d3f58}                   fe80::5efe:192.168.1.2%13       Down        Skip
=======================================================================================================================


Interface  . . . . . . : 192.168.1.2/255.255.255.0
Network Address  . . . : 192.168.1.0
Broadcast Address  . . : 192.168.1.255
Usable address range . : 192.168.1.1 - 192.168.1.254
Size . . . . . . . . . : 255 addresses
Scanning:

  192.168.1.1     [4B-37-6E-9A-A7-1D]
  192.168.1.255   [FC-9E-39-05-4F-01]
  192.168.1.117   [AC-D1-B7-83-12-E9]
  192.168.1.2     [B5-9E-71-39-8F-51]
  Scanning 213/255 ...