ABBYY Business Card Reader - Scan cards ≡ in a second and manage them everywhere ☁
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Covve scan - AI-powered, super accurate business card scanner
draw.io - Online diagramming application
Wondershare EdrawMax - Wondershare EdrawMax is an all-in-one application for creating professional-looking documents, visualizing, and collaborating better.
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.