FontStruct

FontStruct is a free browser-based font-building tool. FontStruct lets you quickly and easily create fonts constructed out of geometrical shapes, which are arranged in a grid pattern, like tiles or bricks.

Once you're done building, FontStruct generates high-quality TrueType fonts, ready to use in any Mac or Windows application.

You can keep your creations to yourself, but the makers encourage users to share their “FontStructions”, so other users can download them or even copy them and make your own variations.