draw.io - Online diagramming application
BiZZdesign - Enterprise Architecture software that helps organizations dramatically increase the success rate of complex enterprise transformation, strategic investment allocation, and risk management.
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.
HOPEX - HOPEX is an integrated software solution to help drive business and IT transformation.
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.
SAP PowerDesigner - SAP PowerDesigner: Enterprise Architecture tools for digital transformation success