Packages with the contrib use flag

app-emacs / org-mode : An Emacs mode for notes and project planning

  • Install user-contributed files

app-metrics / collectd : Collects system statistics and provides mechanisms to store the values

  • Install user-contributed files in the doc directory

app-office / magicpoint : X11 based presentation tool

  • Install additional contributed scripts

dev-util / codeblocks : The open source, cross platform, free C, C++ and Fortran IDE

  • Build additional contrib components

dev-vcs / gitolite : Highly flexible server for git directory version tracker

  • Install user-contributed files

dev-vcs / gitolite-gentoo : Highly flexible server for git directory version tracker, Gentoo fork

  • Install user-contributed files

media-libs / opencv : A collection of algorithms and sample code for various computer vision problems

  • Install user contributed scripts from opencv_contrib (Experimental!)

sys-apps / firejail : Security sandbox for any type of processes

  • Install contrib scripts

sys-apps / lm-sensors : Hardware Monitoring user-space utilities

  • Installs user contributed configuration files so you don't need to find settings on your own for your system if somebody else has already created such a configuration for sensors/mainboards you are using.

sys-kernel / kpatch : Dynamic kernel patching for Linux

  • Enable contrib kpatch services files.

x11-misc / i3blocks : highly flexible status line for the i3 window manager

  • Install contrib modules

x11-plugins / vicious : Modular widget library for x11-wm/awesome

  • Install extra widgets, some for less common hardware, some contributed by Vicious users.

x11-wm / pekwm : A lightweight window manager initially based on aewm++

  • Install optional extras in the documentation directory

x11-wm / stumpwm : Stumpwm is a Window Manager written entirely in Common Lisp

  • Install contrib modules