Links allows you to run a complex link directory without being overwhelmed by editing and updating HTML pages.
Links is distributed as shareware.
Users who purchase the license do not have to keep the link. Start with the home page of this sample directory, and navigate through the site. You can download the source here . If you are stuck, be sure to stop by the Support Forum to ask a question, it's quite busy, and is usually the fastest way to get an answer. I can't say enough good things about the people there.