GUI Tools
Terminal emulators​
Guake - is a dropdown terminal made for the GNOME desktop environment.
Terminator - is based on GNOME Terminal, useful features for sysadmins and other users.
Kitty - is a GPU based terminal emulator that supports smooth scrolling and images.
Alacritty - is a fast, cross-platform, OpenGL terminal emulator.
Network​
Wireshark - is the world’s foremost and widely-used network protocol analyzer.
Ettercap - is a comprehensive network monitor tool.
EtherApe - is a graphical network monitoring solution.
Packet Sender - is a networking utility for packet generation and built-in UDP/TCP/SSL client and servers.
Ostinato - is a packet crafter and traffic generator.
JMeterâ„¢ - open source software to load test functional behavior and measure performance.
locust - scalable user load testing tool written in Python.
Browsers​
TOR Browser - protect your privacy and defend yourself against network surveillance and traffic analysis.
Password Managers​
KeePassXC - store your passwords safely and auto-type them into your everyday websites and apps.
Bitwarden - open source password manager with built-in sync.
Messengers/IRC Clients​
HexChat - is an IRC client based on XChat.
Pidgin - is an easy to use and free chat client used by millions.
Messengers (end-to-end encryption)​
Signal - is an encrypted communications app.
Wire - secure messaging, file sharing, voice calls and video conferences. All protected with end-to-end encryption.
TorChat - decentralized anonymous instant messenger on top of Tor Hidden Services.
Matrix - an open network for secure, decentralized, real-time communication.
Text editors​
Sublime Text - is a lightweight, cross-platform code editor known for its speed, ease of use.
Visual Studio Code - an open-source and free source code editor developed by Microsoft.
Atom - a hackable text editor for the 21st Century.