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

SysVinit: the Linux System V Init

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

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

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

FFmpeg: a complete, cross-platform solution to record, convert and stream audio and video

Mesa: a 3D graphics library

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

Berkeley DB: a family of open source developer databases from Oracle

LVM: the logical volume manager

LibreSSL: an implementation of SSL and TLS protocols, forked from OpenSSL

Bitcoin: an innovative payment network and a new kind of money

Krita: a cross-platform application that offers an end-to-end solution for creating digital art files from scratch

Tor: a network of virtual tunnels that allows people to improve privacy and security on the Internet

Plasma Desktop: a desktop environment

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

snapd: a tool to support and manage .snap applications that are portable across different Linux systems

Rust: a systems programming language that runs blazingly fast, prevents segfaults and guarantees thread safety

GnuPG: a tool for secure communication and data storage

Flatpak: a framework for Linux application sandboxing and distribution