ack -A 5 -B 5 recorder /usr/share/doc/

ack

grep-like program specifically for large source trees

Ack is designed as an alternative for 99% of the uses of grep. ack is intelligent about the files it searches. It knows about certain file types, based on both the extension on the file and, in some cases, the contents of the file.
translation app for GNOME

dialect

translation app for GNOME

Dialect is a translation app for GNOME.
SID music editor

cheesecutter

SID music editor

This is a tracker program for composing music for the SID chip. It uses the reSID engine for SID emulation. The packed files can be played on a real C64.
Adaptive Gtk+ theme

adapta-gtk-theme

Adaptive Gtk+ theme

Adapta is an adaptive theme based on Material Design Guidelines for GNOME/GTK+ based desktop environments.
Signage font

fonts-allerta

Signage font

This is an open source typeface designed for use in signage. Allerta was designed to be easily and quickly read from a distance. Each letter exploits the most unique aspects of that individual letter so that each character can be easily distinguished from any other.
black letter face

fonts-gamaliel

black letter face

The type is based on the gothic letters used by the Barcelonese printer Joan Rosembach in 1496.