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.” [xBlog: The visual thinking weblog | XPLANE]