OpenConnect is a free SSL/HTTP/SSH VPN client for Cisco AnyConnect and ocserv gateways. It's an open-source project, which means you can customize the source code and build your version. You can use it on any platform supported by the OpenConnect package.

You can connect to any server using a custom tunnel that will allow you to access any site and service. It supports the most common protocols: HTTP, HTTPS, SSH, and VPN. It can be used to encrypt your traffic and protect your privacy.

The app is 100% free and open source. It does not require root access or special privileges.