tinc is a Virtual Private Network (VPN) daemon that uses tunnelling and encryption to create a secure private network between hosts on the Internet.
Riseup Labs is the research arm of the Riseup collective. Riseup Labs is a non-profit corporation dedicated to the development of software libre for social justice.
The Monkeysphere project's goal is to extend OpenPGP's web of trust to new areas of the Internet to help us securely identify each other while we work online.