JustVPN is described as 'free unblock proxy VPN for your Android device. You can unblock geo restrictions for YouTube, your browser without limits. It's an entirely unlimited & free virtual private network. Quickly establish a connection by merely tapping connect' and is an app in the Security & Privacy category. There are more than 100 alternatives to JustVPN for a variety of platforms, including Windows, Android, iPhone, Mac and iPad. The best alternative is ProtonVPN, which is both free and Open Source. Other great apps like JustVPN are Psiphon (Freemium, Open Source), Windscribe (Freemium), Shadowsocks (Free, Open Source) and TunnelBear (Freemium).
Bitmask is an EXPERIMENTAL open source application to provide easy and secure encrypted communication. You can choose among several different service providers or start your own. Currently, it supports encrypted internet (VPN) and encrypted email.
VPN Gate Academic Experiment Project is an online service as an academic research at the Graduate School of University of Tsukuba, Japan. The purpose of this research is to expand the knowledge of "Global Distributed Public VPN Relay Servers".
sshuttle: where transparent proxy meets VPN meets ssh sshuttle is the only program that solves the following common case: Your client machine (or router) is Linux, FreeBSD, or MacOS. You have access to a remote network via ssh.
FreePN is the first completely free, completely open network dedicated to protecting your online privacy. Joining the network is easy: just download and install the app. No accounts, no registration, no setup. Once you start the app, you're already protected.