In my talks and on the blog, I use a ton of media. Some of it is online for free (public domain), some of it is copyrighted (and I used it anyway in my younger, less-wise years), and some is Creative Commons, where attribution is required and respected.
This is where I can drop that respect. Images in my slides are cited already, this is other stuff.
Make Failure Cheap
Starting this list with my favorites, the four icons in this talk came from the Noun Project, as do most of my icons and media.
Feet In Both Camps: The Quest to Stay Relevant