charmap.app 0.3~rc1-3build1 (amd64 binary) in ubuntu bionic

 This is a character map. It is developed using the GNUstep development
 environment (www.gnustep.org) and is meant to contribute to GNUstep's promise
 towards a desktop environment.
 .
 Charmap offers font selection, allowing one to easily see all the
 glyphs which a particular font offers.