UML, modelling tools, code generators and code analysis tools
Template:UML, modelling tools, code generators and code analysis tools for Pascal
Umbrello UML Modeller (open source)
Creating diagrams from code, and generating code from your model. Supported languages: ActionScript, Ada, C++, C#, D, IDL, Java, JavaScript, MySQL and Pascal. https://umbrello.kde.org
ESS-model for Lazarus (open source)
Generate class diagram from pascal source files. Supported language: Pascal. https://sourceforge.net/projects/essmodelforlaza/
GitUML (paid, free limited edition)
Generate diagrams and code maps from pascal source files. Supported languages: Python, Java, Javascript, Objective C, C#, Pascal. https://gituml.com
Visual Paradigm (paid, free limited edition)
Creating diagrams from code, generating code from your model. UML, BPMN, SysML, SoAML, UX, CMNN, CJM, DFD, ERD, REST, ORM, EA, Agile, Scrum, Flow Chart, Mind Mapping, Project Management, Team Collaboration... Supported languages: Java, C#, C++, Python, PHP, Hibernate, Ruby, VB.NET, ODL, ActionScript, IDL, Pascal, Perl, XML, XML Schema, Objective-C, Ada. https://www.visual-paradigm.com