Buying cheap tools is "penny wise and pound foolish." If you'd rather invest in quality tools, you want to start at Amazon's Contractor Supply Page. One of the first things you'll notice is that it says (Beta), meaning the page is still being tested. Occasionally some search results may be a little odd, but the page is fully functional otherwise.
There are quite a few brands represented at Amazon's Contractor Supply by Brand page, so I've tried to break them into meaningful groups. Of course that is easier said than done. Some companies make a broad range of products that would fit in a number of categories. Others beg to be in a "miscellaneous" category, but they can't all go there -- so don't take these groups too seriously. They're just an attempt to make things a little easier to find.
