When I was at Disney back in 2011, we used this daily for a year: https://www.websequencediagrams.com/ https://www.websequencediagrams.com/ If you have a good

When I was at Disney back in 2011, we used this daily for a year: https://www.websequencediagrams.com/ https://www.websequencediagrams.com/ If you have a good tech architect running a meeting this tool is great to create sequence flows on the fly. It's also got great builtin features like exporting and an API for integration. Last but not least, it has the Rational Rose theme @haddr mentioned but my personal favorite is boring ol' Blue Modern