MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
TiddlyWiki - a non-linear personal web notebook
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
Confluence - Confluence is content collaboration software that changes how modern teams work
PHP - A popular general-purpose scripting language that is especially suited to web development