Mitchell 1 - Mitchell 1 is a leader in providing automotive repair software and repair shop solutions that simplify everyday tasks for automotive professionals.
draw.io - Online diagramming application
Omnique - Omnique automotive repair shop management software provides 100% Free Online Setup, Affordable, Customizable Pricing, Free, Unlimited Tech Support and Online Auto Repair Manuals
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.
AutoPlan - Automobile Repair and Maintenance Software
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.