FntSample is a tool that can be used to make font samples that show coverage of the font and are similar in appearance to Unicode Charts. It was developed by Eugeniy Meshcheryakov for use with DejaVu Fonts project. FntSample is licensed under GPL version 3 or later.
FntSample can be downloaded from the project page. Development version is also available in Git repository:
git://fntsample.git.sourceforge.net/gitroot/fntsample/fntsample
It is also possible to browse the repository.
For building fntsample the following libraries are needed: cairo, fontconfig, FreeType2, GLib, and Pango. They should be available in most Linux distributions. Additionally Unicode blocks file is required.
Please see FntSample Manual and PDFOutline Manual for usage instructions. Those documents also contain some examples. Examples of charts produced with fntsample can be found on DejaVu Fonts PDF Samples page.