Netdiscover

"Netdiscover" is an active/passive address reconnaissance tool, mainly developed for those wireless networks without dhcp server, when you are wardriving. It can be also used on hub/switched networks.

Built on top of libnet and libpcap, it can passively detect online hosts, or search for them, by actively sending arp requests, it can also be used to inspect your network arp traffic, or find network addresses using auto scan mode, which will scan for common local networks." source: netdiscover

Here are the different available options of this tool:

In this example, i am going to use "netdiscover" to search for available hosts on my wireless interface:

You can input the interface of your choice, if you are cable connected for example, your internet interface should be eth0. To see what available network interfaces you have, opên a terminal and type: ifconfig