Private Internet Access

Supports: Windows, OS X, Linux, iOS, Android
Protocols: SSL, PPTP, IPSec, and L2TP. You can also configure Private Internet Access to work on your DD-WRT or Tomato router (via SSL/OpenVPN) for constant security.
Home Country: United States, and has exit servers in the US, Canada, the UK, Switzerland, Romania, and the Netherlands.
Logging Policies: The service keeps no logs of your activity whatsoever (in fact, the only things they do keep are your email address and payment information,) uses shared IPs, and has committed to keeping your data private. Price: Pricing starts at $7/mo to $40/yr, and you can read more about their plans and pricing here.

ProXPN

Supports: Windows, OS X, iOS
Protocols: SSL, PPTP.
Home Country: United States, with exit servers in the US, The Netherlands, Singapore, and the UK.
Logging Policies: proXPN keeps minimal logs of your activity. proXPN collects your email address, payment information (if you're a premium user,) bandwidth usage, connection duration, and login/logout times. They've committed to only keeping those logs for 14 days or less, and promise to never share their logs with anyone, period.
Price: proXPN has a free plan, which limits your transfer speeds to 300kpbs and restricts you to one exit location (Miami) in the United States. Premium accounts unlock support for PPTP (if you want to connect a mobile device or a router,) remove the transfer cap, and allows you to choose from any of the company's other exit locations. Premium plans start at $10/mo, and you can read more about their pricing and plans here.

TorVPN

Supports: Windows, OS X, Linux, iOS, Android
Protocols: SSL (they often refer to it as OpenVPN), PPTP, and full SSH tunneling.
Home Country: Hungary, with exit servers in Hungary.
Logging Policies: The service doesn't log your connection aside from bandwidth usage to compare against your quota, and your payment details. They also are committed to your privacy, and specifically say they won't surrender their data without a Hungarian court order.
Price: Free TorVPN users are limited to 1GB/mo downloaded before they're cut off, and Premium accounts start at 5 EUR/mo ($7mo) for 5GB/mo and go up to 30 EUR/mo ($38/mo) for 100GB. Keep in mind they have a no-refunds policy, and that even though you ride the Tor network, they're a separate entity from the Tor Project. You can read more about their pricing and plans here.