
yEd
draw.io
LucidChart
OmniGraffle
PlantUML
Dia
UMLGraph
Gliffy
Nullstack
Deno
yEd
Nullstackdraw.io - Online diagramming application
Deno - A secure runtime for JavaScript and TypeScript built with V8, Rust, and Tokio.
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.
OmniGraffle - OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.