1. XhprofXHProf is a function-level hierarchical profiler for PHP and has a simple HTML based user interface.
2. PhabricatorEffective June 1, 2021: Phabricator is no longer actively maintained.
5. JavelinLarge, bloated Javascript framework with an unintuitive, verbose syntax and very few features. Browsing its inelegant, poorly written source is an unwelcome experience.