ProcessOn Alternatives

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.

Online diagramming application

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

The ObjectAid UML Explorer is an agile and lightweight code visualization tool for the Eclipse IDE.

OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.

Looking for an affordable software with Enterprise Architecture tool, PMBOK tool, UML tool, Agile tool, BPMN tool and UX tool? Read this page for details.

ArgoUML, free and safe download. ArgoUML latest version: Open-source diagramming application for personal computers. ArgoUML is a program that allows users to create complex and professional diagrams.

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

Eclipse Papyrus is an industrial-grade open source Model-Based Engineering tool. Eclipse Papyrus has notably been used successfuly in industrial projects and is the base platform for several industrial modeling tools.

Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

freemium $12.5 / Monthly (Per user - Business Class)

A messaging app for teams who see through the Earth!

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.