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!
Code2Flow - An easy solution to create product flows.
Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.
Flowchart.js - Draw SVG flow charts from simple text representations of the diagrams.
IOctopus - IOctopus is an online mind map service for a dive deep into the mind for the best ideas.
LaTeXDraw - LaTeXDraw is a graphical drawing editor for LaTeX.