The Unified Modeling Language™ – UML – is OMG’s most-used specification, and the way the world models not only application structure, behavior, and architecture, but also business process and data structure.
Draw professional looking UML diagrams just with simple textual descriptions. Check out how.
Achieve using PlantUML extension for MediaWiki.
MediaWiki is a free software open source wiki package written in PHP, originally for use on Wikipedia. It is now also used by several other projects of the non-profit Wikimedia Foundation and by many other wikis, including this website, the home of MediaWiki.
Procedure to install Media Wiki on Ubuntu is here.
Procedure to install PlantUML extension on Media Wiki is here.