Pencil Project
Pencil is a standalone app or Firefox extension that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Diagramo is an online flowchart software - diagrams (create, edit and share) - organization charts (create, edit and share) - network diagrams (create, edit and share) - graphs (create, edit and share)
Diagramo is an online flowchart software
diagrams (create, edit and share) organization charts (create, edit and share) network diagrams (create, edit and share) graphs (create, edit and share)
web-based flowchart html5-based graphs export-to-png
Pencil is a standalone app or Firefox extension that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Free Open Source Mac OS X Windows Linux Firefox Electron / Atom Shell
draw, part of the apache openoffice suite, is a graphics editor that gives you the tools to communicate with visuals and diagrams.
Free Open Source Mac OS X Windows Linux
mockingbird is an online tool that makes it easy for you to create, link together, preview, and share mockups of your website or application. It is not Flash based.
Commercial Web
Browser based Chart and Diagram tool. Requires sign up. Free account allows one diagram to be saved. Very easy to use, professional looking.
Commercial Mac OS X Windows Linux iPad Web
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
Free Windows
ProcessMaker is a cost effective and easy to use open source business process management (BPM) or workflow software application.
Freemium Android iPhone Android Tablet iPad Web
Diagrammix is a tool for efficiently building attractive diagrams. If you are an office worker, developer, manager, supervisor, student or home user you can draw almost anything in extremely simple and intuitive way.
Commercial