http://www.gnu.org/software/gfe/gfe.html

Font Editor for GNU / Linux. In early stage of development, but can only download the source code.

http://fonteditor.org/

Source Editor is a project of free editing program sources under development. Is currently only released in demo form online.

http://www.alphabetsynthesis.com/

Alphabet Syntesis Machine is an interactive work online to create imaginary alphabet or nonexistent. Starting from a drawing of glyphs and setting a series of parameters that govern the automatic creation of an alphabet more or less absurd from this glyph. Once completed script can be downloaded in True Type format.

It is a tool for creating professional typesetting, but an experiment where it tested the boundaries between the familiar and chaos, language and gestures.

PLATFORM: Platform (online)
LICENSE:
PRICE: Free

http://www.doubletype.org

DoubleType is another project for a publisher of open source fonts. It is intended primarily but not exclusively, by Japanese typography.

I downloaded it for me with hope that was more user friendly than fontforge , perhaps if you will, for the moment the project is very recent and have not taken more than an alpha version pretty skinny (years away from the quality of fontforge), is perhaps too early to judge.

Platform: Windows, Linux. Requires Java installed on the machine.
License: Free
PRICE: Free

http://fontforge.sourceforge.net

Source Forge is a publisher of open source code that allows us to create fonts or edit existing ones. With features like Fontographer or Fontlab, allows us to design tools with outline fonts and vector publish them as True Type, Open Type and Postscript Type 1 and Type 3, as well as bitmap fonts among others. Source Forge allows us to work from the import file SVG, EPS, bitmap, TIFF and others Xfig and export EPS, PDF, PNG, and bitmap Xfig.

Similar Fontographer, Fontlab
OPERATING SYSTEMS Source Forge can be run on Linux, Macintosh (X11-bearing available on the web-Apple) and Windows (Cygwin or with fontforge-MinGW)
LICENSE: BSD