List of free vpn stuff for developer👇🏽
If you're looking for all programming tools around vpn (not just free). Check this page List of vpn Programming Tools

Netmaker
Connect your devices securely, wherever they are. Netmaker lets you create the fastest possible distributed mesh VPN. Powered by WireGuard.
Tag: vpn, wireguard, remote, cybersecurity, networking
Manage WireGuard networks
Create mesh VPNs
Create gateways into remote environments
Provide private DNS
Automate ACLs
Connect your infrastructure
Administrate with a UI panel

Tailscale
Tailscale is a zero config VPN for building secure networks. Install on any device in minutes. Remote access from any network or physical location.
Tag: VPN, firewall
1 user 20 devices 1 subnet router Secure, peer-to-peer connections SSO and MFA Sharing, Magic DNS, and more

The 2hO Network
A totally transparent, always-on, mesh-based, secure remote network that keeps you and your devices connected wherever you are
Tag: vpn, firewall, remote, wireguard, cybersecurity
Free for non-commercial use. A single user account Multiple devices End-to-end encryption Automatic roaming Access sharing Friendly DNS names Access to support

Telebit™ Cloud
Break out of localhost. Access your devices from behind firewalls. Securely access your services from anywhere. An easy-to-use secure tunnel for all sorts of wonderful things (kind of like a poor man's VPN).
Tag: VPN, firewall

WireGuard Admin App
WGAdmin turns a Raspberry Pi into a simple WireGuard VPN Appliance.
Tag: wireguard, vpn, raspberry pi, cybersecurity, remote access