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.
PathVisio is a free open-source pathway analysis and drawing software that allows drawing, editing and analysing biological pathways.
PathVisio is a free opensource pathway analysis and drawing software that allows drawing, editing and analysing biological pathways. It provides a basic set of features for pathway drawing, analysis and visualization. Additional features as plugins.
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
Lightweight, powerful, easy to use, UML tool Software Ideas Modeler is a lightweight and powerful CASE tool. It supports UML 2.2 diagrams and a lot of other ones. Software Ideas Modeler is freeware (for non-commercial use).
Free Personal Windows
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
ARIS Express is based on the proven ARIS methodology and industry standards. Its intuitive user interface and the latest improvements in modeling assistances enable instant results.
Free Windows
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
Creative Docs .NET is a vector-based graphic design tool with support for rich text, ideal to quickly write short documents, manuals, posters, illustrations, schemas, plans, flow charts, and much more.
Free Windows
ADONIS:Community Edition is a free version of the BPM toolkit ADONIS aimed both at users new to the business process management, who need an intuitive tool for documenting processes and publishing them as HTML and Word, as well as BPM...
Free Windows