Top 10 Diagramming and Flowchart software

Diagramming and Flowchart software allow to create UML diagrams, flowcharts, network processes and architectures, entity relationship diagrams, visualize program workflows.

See also: Prototyping tools, Online Photo Editors, Mind Mapping software
1 is a web-based diagram editor. Create and share flowcharts, network diagrams, floor plans, user interface designs and other drawings online. Gliffy free alternatives are: Google Drawings, Creatly, DrawAnywhere, Diagramly
Create professional diagrams to simplify complex information with updated shapes, collaboration tools and data-linked diagrams. Simplify complex information with professional diagrams you can create in just a few clicks. Visio makes diagramming simple - whether you want to quickly capture a flowchart that you brainstormed on a whiteboard, map an IT network, build an organizational chart, document a business process, or draw a floor plan. Microsoft Visio free cloud alternatives are: Gliffy, Google Drawings, Creatly, DrawAnywhere, Diagramly
OmniGraffle can help you make eye-popping graphic documents—quickly—by providing powerful styling tools, keeping lines connected to shapes even when they’re moved, and magically organizing diagrams with just one click. Create flow charts, diagrams, UI and UX interactions, and more. Whether you need a quick sketch or an epic technical figure, OmniGraffle and OmniGraffle Pro keep it gorgeously understandable.
4 is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. is an online image editor that provides its user fast, easy and free way to create simple diagrams without the need to install anything on their computer. Everything that offers can be quickly accessed via your web browser.
Lucidchart is your solution for visual communication. Flow charts, diagrams, UML sketches, and ER models have never been easier. We've redesigned the entire diagramming process to make it as easy as possible. Make flow charts, wireframes, mind maps, and org charts.
Easily draw diagrams online using Creately's online diagramming tool. Diagram software packed with templates and features. 50+ types of diagrams with specialised features to help you draw faster and better. Real-Time collaboration and Projects help you work with clients and colleagues where ever you are.
Grapholite is an easy to use, touch-friendly, inexpensive, yet very powerful alternative to Visio that can be used for all types of business graphics: flowcharts, floor plans, office layouts, uml diagrams, organizational charts, mind maps, venn charts, bpmn diagrams, web-site structures and wireframes, technical drawings, network layouts, ui mockups and much more.
SmartDraw software is the fastest and easiest way to make presentation-quality flowcharts, org charts, floor plans & any other chart or diagram in just minutes.
Collaborative whiteboard in Google Docs. Drawings may be collaboratively co-edited, downloaded into standard formats and copy and pasted into Google Docs.
Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, etc. . Draw lets you manipulate graphical objects, group them, crop them, use objects in 3D and much more.