nomnoml Alternatives

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

Open Source

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.

Create FREE one-page sites with limey.io. Receive gifts. Capture leads. Share your favorite photos. All in a matter of minutes.

Visit website freemium $5.0 / Monthly (Lite paid plan)

Online diagramming application

Open Source

The new interface for work to ideate, plan, and execute

freemium $5.0 / Monthly (Unlimited canvases and items)

Gravizo is an online text based diagram generator, it supports DOT, PlantUML, UMLGraph syntax and SVG in JSON format.The free version can be used online only.

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.

Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom

Open Source

Software for create adaptable and multilevel diagrams, concept maps, mind maps and models

A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.

Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.

Open Source

ProtoPie is the easiest tool used to turn your UI/UX design ideas into highly interactive prototypes for mobile, desktop, web, all the way to IoT.

paid Free Trial $13.0 / Monthly

Define awesome experiences through wireframes & prototypes.

Xmind is a brainstorming and mind mapping application.