nomnoml Alternatives

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

Open Source

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.

LiveSession helps you analyze users’ behavior, improve UX, find JS bugs, and increase conversion rates using session replays, and event-based product analytics.

Try for free freemium $99.0 / Monthly (10k sessions / unlimited users / 1-month data retention)

Online diagramming application

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.

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

freemium $5.0 / Monthly (Unlimited canvases and items)

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

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

Free diagramming, drawing and modelling tool. Supports Unified Modelling Language (UML2) and Business Process Modelling Notation (BPMN2) from the Object Management Group (OMG).

Simplify and communicate complex information using data-linked diagrams.

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.

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

Define awesome experiences through wireframes & prototypes.