http://www.fontfoundry.com/

http://www.fontfoundry.com/main.phtml

http://www.microsoft.com/typography/links/links.aspx?type=comm&part=4

http://www.microsoft.com/typography/links/links.aspx?type=custom&part=5

http://en.wikipedia.org/wiki/Type_foundry

http://www.fontshop.com/fonts/foundry/font_bureau/

http://www.p22.com/

http://www.digitalthread.com/designresources/fonts_type/font_foundries/

http://www.fontsquirrel.com/foundries

http://www.fontex.org/serif-fonts.html