Active PHP Bookmarks  

Active PHP Bookmarks (APB) is a web-based program that allows you to store your bookmarks and display them in many useful ways. It will sort your bookmarks with usability in mind, keeping often-used bookmarks at your fingertips. It has a bookmark search, private/public bookmarks, nested groups, usage rankings, popularity sorting, and a quick add feature.

Hosting Requirements: PHP
Database: MySQL
Price: Free (GPL)

   online-bookmarks  

online-bookmarks is a set of PHP scripts, to store Bookmarks and Favorites online. That means, that they are kept on a Web server, where they actually belong to, for people who work often with different computers and browsers. It is a Multi-User System, storing all data in a MySQL Database. Its use is simple and the usability is similar to existing famous systems, so users do not need to get familiar with online-bookmark.

Price: Free (GPL)

   SiteBar  

Access and manage your private, shared or public bookmarks from any computer and browser connected to the Internet! Create personal, family, team, company or enterprise-wide bookmarks with flexible access rules, permissions and customizable design!

Hosting Requirements: Unix/Linux, Windows
Database: MySQL
Price: Free

   EasyBookMarker  

EasyBookMarker is a program that allows you to store and display your bookmarks in different categories and subcategories. It is usefull also for lists of things grouped by categories as CDs, songs or games. It stores the information with usability in mind, keeping often-used bookmarks at your fingertips. It sorts and displays your most recently used bookmarks in order to make sure that the most often-used bookmarks are always at your fingertips while the other bookmarks stay out of your way. Using EasyBookMarker your bookmarks will be available to you no matter where you go.

Price: Free