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:
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.