Cross-platform multi-protocol VPN software
Linux Desktop OS for professionals
Bringing intranet on the internet with Zero-Config Mesh VPNS.
IPsec / IKEv2-based VPN software for Linux.
Network link bonding/trunking/aggregation and multichannel VPN daemon
A simple yet powerful open source VPN solution
Lomalarga is a VPN-like service based on SSH and Linux.