Note: Sorry for my english, is not my native language. Corrections are welcome...

Yes, there are of course a lot of these kinds of tools on the internet.  So why should there be another?  I found myself once in a while needing to know how much of my hard disks (or pendrives) are full, what is filling this space, and also wanting this displayed in a way that I find intuitive.  Of course, who likes paying for software, so I've looked for a free program that would solve my problem, but normally when they're free they aren't well made, or the interface is ugly, and so on.  I personally don't want to pay for a program that I rarely use, even if I had the money.  I once found a very useful program called OverDisk, but the developer has abandoned its beta version, and though the program was useful, its user interface was not to my taste.

So, I decided to develop the program myself and give it away for free, for those who don't want to pay for something that they don't find indispensable.  So please download it and try it out and let me know what you think.

(Corrections made by Stephen O'Connor, thanks man!)