A cross-platform network scanner that is fast and simple to use
Angry IP scanner is fast and friendly network scanner for Windows, Linux, and Mac. It is very extensible, allowing it to be used for very wide range of purposes, with the primary goal of being useful to network administrators.
Fast Ip Scanner is a simple software utility that allows you to scan for available ports and online IP addresses.
All you have to do is set the start and end IPs and press the Start button. You can also set the number of threads you want to use and the number of ports you want to scan.