I was first introduced to Folding@Home when it's software came pre-installed on my PS3 as a kid. I didn't fully understand at the time what it was, but I did grasp that if I just left it running when I wasn't using my PS3 I could help some medical researchers accomplish their goals. Now that I've gained a better understanding of the project, I'm more impressed by what they've accomplished, both for social good, and from an engineering perspective.
If you're not familiar with Tristan Harris, the author of this article, he's been referred to as the “closest thing Silicon Valley has to a conscience" and is the founder and president of the Center for Humane Technology. The more aware you are of how technology takes advantage of human psychology, the better you can combat it and ensure that you are using it, rather than it using you. This article is a great intro to raising that awareness.