draw.io - Online diagramming application
Figma Map Maker - Figma plugin to generate map, supporting Google Maps, Mapbox
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Figma Super Tidy - Figma plugin to easily align, rename and reorder your frames
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Wireframe for Figma - Lightning fast wireframing on figma (500+ elements)