Add yourself if you choose. This neat idea contains 2,500 hyperlinks divided among 210 categories on a disk you get via real mail. Since nothing needs to be retrieved from the Net, you can search almost instantaneously and offline. Furthermore, the installation instructions for Macs and PCs - well, they only work for PCs. At least Mac users are used to such abuse.
Many examples abound here, along with technical explanations.
Check out the excellent collection of industry links as well. Inc. All rights reserved.