IP scanner for Linux

Hi Guys, I'm looking for an IP scanner that can scan a range of addresses and give me a list of all the alive hosts, without me having to manually ping all 255 available addresses. Up untill now I have always used Angry IP scanner under windows but would prefer if I can do all my work from my linux box. Before anyone says 'why don't you just use dhcp?', it's for configuring static ip's for devices such as wireless access points, voip ata's etc, where we need to know the ip to configure them via a web browser. Any help greatly appreciated, Cheers, Aidan.