cmake: a cross-platform, open-source build system

VLC: a cross-platform media player and streaming server

Mozilla Thunderbird: a full-featured e-mail and newsgroup client

Wireshark: a network protocol analyzer

Google Chromium: an open-source edition of Google Chrome, a graphical web browser

Samba: a free software re-implementation of SMB/CIFS networking protocol

Mozilla Firefox: a web browser for Windows, Linux, macOS, FreeBSD and Android

Cacti: a complete network graphing solution

Window Maker: an X11 windows manager, similar to NeXTSTEP

Bison: a replacement for the parser generator Yacc

Mesa: a 3D graphics library

libvirt: a toolkit to interact with the virtualization capabilities of the Linux kernel

httpd: a high-performance HTTP server, Apache 2.x version series

Qt: a C++ application framework for writing graphical applications

WordPress: publishing software for the world wide web

DNF: a new package management library and a fork of yum

Ruby: interpreted, dynamically typed, pure object-oriented scripting language

Qt Creator: a cross-platform IDE tailored to the needs of Qt developers

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

Flatpak: a framework for Linux application sandboxing and distribution