fontconfig is described as 'Fontconfig is a library for configuring and customizing font access' and is an app in the OS & Utilities category. There are five alternatives to fontconfig for a variety of platforms, including Windows, Linux, Online / Web-based, Google Chrome and Xfce. The best alternative is Font Manager, which is both free and Open Source. Other great apps like fontconfig are MacType (Free, Open Source), Font Finder (Free), gdipp (Free, Open Source) and ClearType Tuner PowerToy (Free).
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
The gdipp project is a replacement of the Windows text render, which brings to you the effect of text like Mac OS and Linux distributions. It is easy to use with ignorable overhead, and it is fully customizable.