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draw.io

draw.io is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. No login or registration are required and features include the ability to save locally (including svg), a range of stencils, .vsdx, Lucidchart and Gliffy import and real time diagram sharing.

Gliffy

Gliffy

"If they could see what Im thinking, they'd get it!" People just understand faster with pictures. It helps them see how inform ...