PHP Link Directory
Although I use Gossamer Links (aka Links SQL) for building link directories and database-driven websites, it does cost $450 per license and is not a cost-effective option for personal or non-commercial websites. So, I spent the day testing out some simple link directory scripts, which had to use PHP/MySQL, of course. The one that stood out above the rest was PHP Link Directory (www.phplinkdirectory.com). It is very easy to use, has a great user interface, and does everything I would want my link directory script to do. It's going to save me a lot of time and effort when building link directories on certain sites that I manage. PHP Link Directory only cost $25 per license, or $75 per license and the right to remove the link back to their website. Quite reasonable, even for a personal site.