A tool for comparing things.
There already are lots of websites out there that compare products. You can filter products and see if the products fulfils your needs. The thing is... certain properties of a product are more important for you than others. So what ends up happening, in my case at least, you create a spreadsheet were all properties of each product you want to compare are side by side. there you give each property a weight and than calculate the points each property gets.
This is were comparator comes in... blabla .. try it out.