Fontmatrix is a font management application for Linux, Mac and Windows, 
concieved by Pierre Marchand in 2007.

It helps keeping your font collection in order, allowing you to enable and 
disable availability of fonts and font families in your system. This is a quite 
helpful tool for designers who tend to have huge collections of typefaces.

Searching for the right font in Fontmatrix is easy thanks to advanced support 
for Panose and user defined filters, as well as tags.

Fontmatrix is also useful for type designers and enthusiasts, because it 
simplifies testing of OpenType features and allows comparing fonts glyph by 
glyph which is extremely useful for learning type design.