I’ve made a list of the best free VPN trial I could find. Note that I’ve only included reliable VPN providers that I recommend.
Apparently, PureVPN and VyprVPN offer free trials, but make it difficult to get your money back, so you may want to avoid those services.
NordVPN is based in Panama and it one of my recommended VPN providers. They offer a 3 day free trial of their services — to get it you must request one from “support(at)nordvpn.com”.
ExpressVPN has a 30 day “no quibble” money-back offer. They provide many good client apps and good customer support. They are one of my top recommended providers. Servers in 78 countries.
IPVanish offers a seven days money back guarantee. They state that if you don’t like the service, you’ll get a full refund. Good support for P2P/Torrenting. Servers in 44 countries.