PUBLIC MARKS with tags drawing & free

+ http://www.sketchswap.com/

Macのごくシンプルなペイントソフトウェア

InputDraw is a cross-browser, fast, simple to integrate widget to use in your forms as a drawing tool and everywhere else as a viewer. It uses SVG as a describing language of drawing. Being a standard, SVG can afterwards be use be a large number of applications, widgets and libraries. In order to use this widget, you don�t need to be a programmer or even know any web programming language like PHP, Ruby, Python, .net, Java, Smalltalk, etc.. Actually, you only need to know some html, what a form is and our JavaScript command to make it work. InputDraw uses flash technology so almost everyone can use it. Remember that there are more installations of flash than windows.

A wiki about free collaborative drawing

childeabaddon's blog

Free World Map Illustrator File

Downloadable and very printable, I find these PDFs extremely useful. So, you can make a 24x30 inch sheet with a green one-inch 10 point grid. Obviously I cannot anticipate all needs, but the grids below should cover most common ones.