flowchart.fun - An open-source tool for generating flowcharts from text

Ideanote - Ideanote is the #1 rated Idea Management solution for companies of all sizes. Collect, develop and manage more of the right ideas from customers and employees to drive your growth.

draw.io - Online diagramming application

Monkkee - Keep a private journal securely on the Internet – to provide a convenient user experience your...

yEd - 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.

Idea Notebook - Idea Notebook is an app that allows you to keep track of your logs business ideas and track as well as organize them.