Angry IP Scanner is a IP address and port scanner. It is a lightweight cross-platform that does not require installation, so it's the perfect tool to use anywhere. Believe it or not, this project is used worldwide; including small and large networks, government agencies and banks. Supports Linux and Mac OSX at the moment.
Before using an application like Angry IP, it would be good to learn a little about port scan and the meaning behind the word. Port scan is basically an attack (or probe) that sends client request to a range of server port addresses on a particular host. From there you can discover active ports and protect yourself from exploitation.
You can download the free edition of Angry IP Scanner at angryip.org. With so many features to list, we thought it would best if you downloaded it for yourself to see how it really performs. Happy Scanning!