typism is a web-based font editor. It is a public site where anyone can create a font for others to use and to study, to modify and to copy.
You write the description of a typeface, design the outlines of a glyph, track the development history and publish any revision in human-readable format to store locally. All it takes to run it is a browser supporting a few open standards.
Typism uses SVG and runs on Google App Engine.