Draw - from a quick sketch to a complex plan, Draw gives you the tools to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for technical or general posters, etc.
Code2Flow - An easy solution to create product flows.
Scribus - Scribus is a desktop publishing (DTP) application.
Flowchart.js - Draw SVG flow charts from simple text representations of the diagrams.
Affinity Publisher - Professional desktop publishing app
DIagrams Through Ascii Art - Java command-line tool to convert ASCII diagrams to bitmaps.
Xpublisher - Xpublisher is a content publishing software that helps you to structure your content and then allows you to easily publish the content on various platforms.