Whimsical Alternatives

Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams. Join 2M+ users & 8000+ teams from around the world.

Online diagramming application

Open Source

Ideanote is the #1 rated Idea Management solution for companies of all sizes. Collect, develop and manage more of the right ideas from customers and employees to drive your growth.

Try for free freemium $49.0 / Monthly (Business Plan, 15 Users)

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.

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

Simple notes app that ties notes together with #hashtags

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.

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

UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.

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.

StarUML

MURAL is a visual collaboration workspace for modern teams.

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

Open Source

UMLet - Free UML Tool for Fast UML Diagrams