vpnbook.com is one of the well-known free VPN services that’s been around for a year now, and it stands out even against some paid VPN services in terms of speed and reliability. (You may want to check our review of VPNBook, made some months ago)
TunSafe Review (includes free WireGuard VPN service)
UPDATE: As of May 2020, it seems that only the Netherlands location is available and all other ones have been removed. TunSafe is a very promising new project, consisting of an implementation of the WireGuard VPN protocol in the form of open-source VPN client apps for Windows, macOS, Linux, FreeBSD as well as mobile platforms iOS and Android. What … Read more