Open Source Security & Privacy Software
Keybase
With Keybase you can communicate with friends and co-worker and store your group’s photos, videos, and documents with end-to-end encryption. Keybase is a free and open-source security app for mobile phones and computers.
VeraCrypt
VeraCrypt is free and open-source disk encryption software. The software is a fork of TrueCrypt 7.1a with enehanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. VeraCrypt is available for Windows, MacOS and Linux.
Pydio
Pydio is an open-source and self-hosted file-sharing and synchronisation software that you can run on your own server. Pydio fits right into your data management policy, as it provides audit and reporting tools. With Pydio you can empower your organization by letting them control and manage content on the server while at the same time complying with the company security rules.
ZeroTier
ZeroTier is a global area network provider that enable the creation of secure networks between on-premise, cloud, desktop, and mobile devices. Allowing you to securely connect to any device, anywhere. ZeroTier combines the capabilities of VPN and SD-WAN to simplify network management, allowing organization to connect team members securely withing a decentralized workforce.
Openswan
Openswan has been a popular VPN alternative for Linux users since2005. It is an IPsec implementation with support for most of its extensions (RFC and IETF drafts), even IKEv2, NAT Traversal, X.509 Digital Certificates and more. Openswan comes packages with various Linux distributions, including Gentoo, Fedora, Ubuntu, Red Hat and others.
FreeOTP
FreeOTP is a token-base two-factor authentication application available for Android and iOS. The application provides implementations of HOTP and TOTP which means that there is no proprietary server-side component used to generate two-factor authentication. Tokens used for authentication can easily be added by simply scanning a QR code.
Replicant
Replicant is a fully free and open source Android distribution designed for freedom, privacy and security. Replicant replaces all proprietary Android components with free and open counterparts allowing you to be in control of your operating system, its software and your personal information and data.
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.
SocialVPN
SocialVPN or IPOP (IP-Over-P2P) is a user-centric, open-source software virtual network that lets end users build their own VPNs. SocialVPN is capable of establish peer-to-peer (P2P) virtual private networks with the help of a social backend like XMPP server (Jabber-Net or Google chat). Such reliable backend can securely authenticate users, maintain a list of each party and establish secure TLS for X.509 certificate exchange.
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.