StarUML 🤩 #14
Description
When I was a student at Kansas State University my Software Arch professor swore by StarUML and I've been a believer ever since.
It ain't pretty but it's by far the most complete UML app I've ever seen, it's got every diagram type under the sun and a nice little plugin community.
I often use it when designing multi-service features or flows using Communication Diagrams, which is like a seq diagram for visual people - very highly underrated diagram type.