Hotspot Shield Elite offers a custom client for Windows, Mac, Linux, as well as Android, iOS, and other operating systems. They also have guides and tutorials available for advanced setup and usage of their VPN on all major operating systems. Hotspot Shield Elite is a solid choice for casual VPN use, and the free version of Hotspot Shield is a great way to try things out first! Hotspot Shield Prices start at $12.99 USD per month.
(Hotspot Shield Elite has not been reported to work for Netflix or Hulu in a while, but it should work for BBC iPlayer and other streaming/Video-on-Demand services!)