I use to ride the train from San Francisco to Sunnyvale and was able to read a lot of books. I had to be careful though because if I got too into the book I would miss my stop.

Audio Books:

Origin of Species by Means of Natural Selection by Charles Darwin -- https://librivox.org/the-origin-of-species-by-charles-darwin...

The Art of War by Sun Tzu -- https://archive.org/details/art_of_war_librivox

Gulliver’s Travels by Jonathan Swift -- https://archive.org/details/gulliver_ld_librivox

Podcasts:

Ruby Rouges (ruby programming talks/programming in general)-- http://rubyrogues.com/

StarTalk with Neil Degrasse Tyson (Space, comedians, science) -- http://www.startalkradio.net/