I thought I was the only one in the world stealing the safety instruction cards from airline seats because of their terrific folk graphics. For radically clear thinking nothing can beat a really good set of wordless diagrams; hundreds of examples from around the world are paraded here. Designers of the world, please heed.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.