IBus: an intelligent input bus for Linux and UNIX

Calibre: an e-book library management application

VirtualBox: a family of x86 virtualisation products for enterprise and home use

ISC BIND: an implementation of the Domain Name System (DNS) protocols

alsa-lib: an audio library for use with the ALSA kernel modules

kmod: a set of programs for loading, inserting, and removing kernel modules

GIMP: the GNU Image Manipulation Program

NetworkManager: a utility aimed at simplifying the use of computer networks on Linux

APT: a front-end for the dpkg package manager

PHP: a server-side HTML embedded scripting language

GTK: a multi-platform toolkit for creating GUIs

Git: an open source version control system

Bison: a replacement for the parser generator Yacc

GNOME Shell: a core user interface of the GNOME 3 desktop

Python: an interpreted, interactive, object-oriented programming language

MyPaint: a nimble, distraction-free and easy tool for digital painters

Mutt: a text-based MIME Email client

OpenSSH: a client and server for encrypted remote logins and file transfers

Blender: a very fast and versatile 3D modeller and renderer

Evolution: information management software providing mail, address book and calendaring functionality