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.
The GoVisual Diagram editor (GDE) provides powerful functionality for editing and automatic layout of diagrams. Diagrams are represented in form of graphs and cluster...
The GoVisual Diagram editor (GDE) provides powerful functionality for editing and automatic layout of diagrams. Diagrams are represented in form of graphs and cluster graphs. GDE contains all the layout styles available in the GoVisual libraries.
flowchart Discontinued diagram-editor diagram
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
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
InsightPoint is a cool multi-scene vector drawing tool for Windows and Linux.
Free Windows Linux
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
SwordSoft Layout is an desktop application that makes it very easy for you to create, preview, and manage mockups of your website, mobile application or desktop...
Commercial Mac OS X Windows
Clickcharts flowchart software allows for easy drawing of diagrams and flowcharts to provide a way of organising and displaying data. Lay out your ideas, organisation...
Free Personal Mac OS X Windows Android Kindle Fire
Delineato - the italian word for "outline". Designed using the WYSIWYN paradigm - What You See Is What You Need - this carefully crafted application is...
Commercial
Online diagramming application which generate diagrams based on text and allows real time collaboration.
Commercial Web
A Powerful idea processor.It's Open Source and Freeware. Create UML Diagrams, Network Diagrams, Flowcharts and many other types of diagrams with the versatile...
Free Open Source Windows Linux
Prototype cheaply and quickly for iPad, iPhone, Android, Windows Phone 7, Facebook and web using Apple Keynote, Microsoft PowerPoint or OpenOffice Impress.
Commercial Web