Teleport: open-source tool for providing zero trust access to servers and cloud applications using SSH, Kubernetes and HTTPS.
Nebula: A scalable overlay networking tool with a focus on performance, simplicity and security.
Matrix: An open network for secure, decentralised communication.
Signal Server: Server supporting the Signal Private Messenger applications on Android, Desktop, and iOS.
Algo VPN: VPN server installer via Ansible (supports many Cloud providers and local install).
Syncplay: Pausing, unpausing and seeking are synchronized over the Internet, giving everyone playing the same file in the same virtual room a shared viewing experience.
FossFlow: Make beautiful isometric infrastructure diagrams.