Top 6 Open-Source Alternatives to ThinkComposer

Product categories

Brainstorming And Ideation Diagrams Flow Charts And Diagrams Flowcharts Idea Management JavaScript Office & Productivity Productivity Prototyping UML UML Diagrams Wireframing

Summary

The top open-source alternatives to ThinkComposer are PlantUML, draw.io, and nomnoml. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

PlantUML Landing Page
1

PlantUML

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Pricing:
- Open Source
#Flow Charts And Diagrams #Diagrams #UML Diagrams 5 social mentions
draw.io Landing Page
2

draw.io

Online diagramming application
Pricing:
- Open Source
#Diagrams #Flowcharts #Wireframing 714 social mentions
nomnoml Landing Page
3

n

nomnoml

nomnoml is a free and open source tool to generate nice looking UML diagrams from simple text definitions.
Pricing:
- Open Source
#Diagrams #Flowcharts #Prototyping 5 social mentions
TiddlyMap Landing Page
4

TiddlyMap

An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!
Pricing:
- Open Source
#Brainstorming And Ideation #Office & Productivity #Idea Management 2 social mentions
Pencil Project Landing Page
5

Pencil Project

Single-user mockup / wireframing / diagramming tool
Pricing:
- Open Source
#Diagrams #Flowcharts #Brainstorming And Ideation 11 social mentions
Mermaid Landing Page
6

Mermaid

Create diagrams and visualizations using text and code.
Pricing:
- Open Source
#Flow Charts And Diagrams #Diagrams #UML 24 social mentions