FDrawable is a rehash of IconicDroid which uses a different approach to accessing icon fonts such as Font Awesome.
IconicDroid provides the essential drawable implementation IconicFontDrawable, but it also includes several specific fonts and enumerates glyphs they provide. This makes it impossible to use other fonts are newer versions of included fonts withoug modifying the library itself. With FDrawable, users register their font assets and create drawable for desired symbol simply by specifying symbols Unicode code point.
IconicDroid is packaged as Android library in apklib format, which is now deprecated. FDrawable is packaged as .aar and is built with Gradle.