WireGuard - Fast, Modern, Secure VPN Tunnel
Unimus - Unimus is a Network Automation and Configuration management (NCM) solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.
Cisco Anyconnect Secure Mobility Client - Get much more than industry-leading VPN client connectivity. Cisco AnyConnect protects your enterprise resources through a single agent. See how.
Oxidized - configuration backup software (IOS, JunOS) - silly attempt at rancid
OpenVPN - OpenVPN - The Open Source VPN
RANCID - RANCID - Really Awesome New Cisco confIg Differ.