Enterprise VPN server
It's not open source but Pritunl works well. Single signon. Supports openvpn, ipsec and wireguard. You can use native clients or theirs.
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
Wireguard Server GUI?
2 projects | reddit.com/r/homelab | 6 Apr 2022
Open-source VPN Web Portal?
1 project | reddit.com/r/homelab | 28 Mar 2022
Looking for a simple VPN solution
3 projects | reddit.com/r/msp | 27 Feb 2022
Is anyone using WireGuard in the workplace?
2 projects | reddit.com/r/WireGuard | 10 Feb 2022
pfSende (or other) as VPN Server (Stand alone)
1 project | reddit.com/r/PFSENSE | 20 Dec 2021