IPScan-II

IPScan-II is a very simple application that enables you to scan a given IP range and detect the addresses which are alive.
Although most of us are already used to complex software solutions able to do the same thing but gifted with many more features, IPScan-II is a rather basic tool created with a single goal in mind: help users scan an entire IP range.
And the whole application relies on this simplicity principle. The interface is minimal and sports a handful of options, all listed at the top of the main window.
Besides the main IP scanning process, IPScan-II also lets you configure the time out, count, TOS and send delay, but also the IP range you wish to look into.
Since it's such a simple application, there's no help file included in the package, which seems just about right given the fact that beginners are supposed to figure out how to use the program in a few seconds.
Of course, IPScan-II works pretty smooth without hampering computer performance at all, being able to get along with all Windows versions on the market.
Overall, IPScan-II is one of the simplest IP scanners available right now, but there's still room for improvements, that's for sure.
It uses the raw socket function and AVL-tree algorithm but that's not enough to convince the average user to give it a try. Despite this, its ease of use and accessibility make it a good choice for beginners.