Nemisis Broadcast Scanner can scan a group of IPs for a specified open port. Say you want to scan 152.1.1.1 to 152.1.255.255 for port 80, you just enter the two IPs, and click start. It uses a MutliSock that is incredibly fast. Also it allows you to copy the IP to the clipboard from the results listbox. if you click on an item in the listbox it will open up a webbrowswer in the program going to the page. This incredibly useful for scanning websites.

Download it here (missing)