An Emacs major mode for editing PHP code. Features: Syntax coloring and indenting; Documentation browse and search functions; Support for Imenu and SpeedBar; Customization options; and support for language features from PHP 5.4 and beyond.
The latest release can be found at https://github.com/ejmr/php-mode and all bug reports should go there..
The Java Elucidator provides support for production of internal documentation following the Elucidative programming paradigm. Documentation and source code are kept seperate, but interlinked through mutual navigation in a two-frame online layout.