ApPHP Tabs is described as 'The ApPHP Tabs is a simple PHP script that generates multilevel menu control which consists of nice-looking tabs'. There are four alternatives to ApPHP Tabs for a variety of platforms, including Linux, Mac, Firefox, Windows and Google Chrome. The best alternative is Tabs Outliner, which is free. Other great apps like ApPHP Tabs are Open Tabs Next to Current (Free), Tab Tally (Free, Open Source) and Tab Stash (Free).
Tab Stash is a no-fuss way to save and organize batches of tabs as bookmarks. Sweep your browser clean with one click of the Tab Stash icon. Your open tabs will be stashed away in your bookmarks, conveniently organized into groups.