Gossamer Links
Whenever I use a software program or service that is so good that I feel like I will never use anything else, well, I'll give the designers the credit they are due. This certainly has been the case with Gossamer Links, a software program from Gossamer Threads (www.gossamer-threads.com).
Gossamer Links (formally known as Links SQL) is a solution for building and maintaining large link directories. It uses PHP/MySQL and gives you absolute control over the output and functionality of your link directory. It does cost $450 per license for a single website, so it's not a program for the casual user, but if you have a website project that requires a database-driven link directory that allows user entries, ratings, and reviews, in my opinion, Gossamer Links is the best choice.