gucharmap
Unicode character picker and font browser
This program allows you to browse through all the available Unicode
characters and categories for the installed fonts, and to examine
their detailed properties. It is an easy way to find the character
you might only know by its Unicode name or code point.
screenruler
measure objects on screen with a variety of metrics
ScreenRuler will display a ruler on screen which allows you to measure the
other objects that you've there. It has the following features:
* Horizontal and vertical measurement in 6 different metrics:
pixels, centimetres, inches, picas, points, and as a percentage
of the ruler's length.
* Cusomizable colors and fonts.
* Keyboard control for precise positioning.
* Option for the ruler to stay always on top of other windows.
fontforge
font editor
FontForge is a font editor.
Use it to create, edit and convert fonts
in OpenType, TrueType, UFO, CID-keyed, Multiple Master,
and many other formats.
fonts-roboto
metapackage to pull in Roboto fonts
Roboto is Google's signature family of fonts, the default font in
Android and ChromeOS and the recommended font for Google's visual
language, Material Design.
gnome-font-viewer
font viewer for GNOME
This program can preview fonts and create thumbnails for fonts.
nfoview
simple viewer for NFO files
NFO Viewer is a simple viewer for NFO files, which are "ASCII art" in
the CP437 codepage. The advantages of using NFO Viewer instead of a
text editor are preset font and encoding settings, automatic window
size and clickable hyperlinks.