draw.io - Online diagramming application
Laravel - A PHP Framework For Web Artisans
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
CodeIgniter - A Fully Baked PHP Framework
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
CakePHP - The Rapid Development Framework for PHP