Free Security & Privacy Software
ReverseSSH
ReverseSSH is a statically-linked ssh server with a reverse connection feature for simple yet powerful remote access. Most people find ReverseSSH useful during HackTheBox, CTF's and similar challenges.
Gnome Authenticator
Gnome Authenticator is a GNOME-based two factor authentication application built for Linux-based operating systems for both mobile and desktop.
Magisk
Magisk is known as a "systemless" root method. It's essentially a way to modify the system without actually modifying it. Modifications are stored safely in the boot partition instead of on the main system. With Magisk you can root phone or tablet to give you complete control over the system with compromising your device.
LineageOS
LineageOS is an open-source Android distribution available for several devices. With LineageOS personalization, privacy and security is on the forefront of development. Allowing you to enjoy an mobile operating system that you are in control of and can personalize to your needs. LineageOS also provides powerful privacy and security tools such as Privacy Guard so that you can be in control of what your apps can do whenever you want.
OTP Auth
OTP Auth is an two factor authentication application that allow you to use calculated one time passwords for your online acconunts. OTP Auth is avalible for iOS and macOS, and works with popular online services such as Google Mail, Amazon, GitHub, Dropbox and many more.
Signal
Signal is a cross-platform encrypted messaging application that has a strong focus on privacy. The application is developed by Signal Messenger LLC and provides users with features like one-to-one and group messages, which can include files, voice notes, images and videos. The software is famous for being used by the whistleblower and privacy advocate Edward Snowden who once said "I use Signal every day, it is the most scalable encryption tool we have".
andOTP
andOTP implements time-based one-time passwords (TOTP) and HMAC-based one-time passwords (HOTP). With andOTP you can simply scan the QR code and login with the generated 6-digit code. Allowing you to more easily and securely access your online accounts.
Wireshark
Wireshark is the world's most widely-used network protocol analyzer software. With Wireshark you can get a better understanding on what's happening on your network. The software let's you do deep analysis across hundreds of protocols at a microscopic level. Wireshark is free and open-source and has been in active development by contributions from volunteers across the globe since 1998. Today the software is used by commercial and non-profit enterprises, government agencies, and educational institutions.
Cryptomator
Cryptomator is a simple tool makes your cloud storage trustworthy. With Cryptomator, you can encrypt your data quickly and save it to your favorite cloud services provider. The tool is released as free and open source software under the MIT License. Allowing you and other developers to verify and build upon the source code, to further strengthen and improve the application.
pwncat
pwncat is a sophisticated bind and reverse shell handler with many features as well as a drop-in replacement or compatible complement to netcat, ncat or socat. pwncat is like netcat on steroids with Firewall, IDS/IPS evasion, bind and reverse shell, self-injecting shell and forwarding magic - and its fully scriptable with Python (PSE)