PBS recently launched a great new iPhone app (also available for iPad) that lets you watch full-length episodes, segments, and previews of upcoming shows. Many of PBS’s top programs are available, including Nova, Austin City Limits, Frontline, and PBS NewsHour, as well as original online programming from Nova ScienceNOW and Independent Lens.

The PBS app also lets you check schedules, set reminders, and save bookmarks to favorite clips, and you can share videos through Twitter, Facebook, and email.

But the best thing about it is the price: free. You don’t get access to all of the programming available on the PBS website, but it currently contains more than 300 videos and more content is being added all the time. This is one of the best iPhone apps I never paid for. Highly recommended.