Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
draw.io - Online diagramming application
Affinity Designer - Professional creative software, exclusively for Mac.
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.
Adobe Illustrator CC - Adobe Illustrator CC is a commercial vector graphics editor.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.