Sentinel is described as 'Network is a network layer that enables a true p2p and decentralized applications and resources marketplace' and is an app in the Security & Privacy category. There are more than 100 alternatives to Sentinel for a variety of platforms, including Windows, Mac, Android, iPhone and iPad. The best alternative is Tor Browser, which is both free and Open Source. Other great apps like Sentinel are Tor (Free, Open Source), ProtonVPN (Freemium, Open Source), Psiphon (Freemium, Open Source) and Mullvad (Paid, Open Source).
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.
Hide My Ass! Pro VPN – The World’s Premium VPN Service - We give you access to the biggest VPN network in the world. - We have more servers in more countries than anyone else – giving you the best possible VPN connection.