draw.io - Online diagramming application
PTC Windchill - Windchill offers breakthrough Product Lifecycle Management (PLM) capabilities, unleashing more data to more stakeholders throughout your organization through a single source of truth for product data and processes.
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.
Enovia - ENOVIA offers product lifecycle management (PLM) solutions fostering innovation and operational excellence across industries.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Propel - Propel is a customer-centric PLM software built on Salesforce App Cloud platform.