StackSocial offers the Private Internet Access VPN 2-Year Subscription for Windows, Mac, Linux, iOS, and Android for $59.95. Coupon code "PIA15" cuts the price to $50.96. That's tied with our mention from last week, $29 under the cost of two years direct, and the lowest per-year price we've seen. This well-reviewed VPN software offers multiple VPN gateways, encrypted WiFi, P2P and VoIP support, and unlimited bandwidth. Deal ends April 25.
Note that this will create a new account; you cannot use this promo to extend an existing subscription.