It's Google's note-taking program. I will not kid you that it's the best note-taking program I've ever used, but it's the most readily accessible one. If you click the tic-tac-toe board in the upper right on the Gmail page, and then click More at the bottom, and then Even More from Google, it's an orange-ish icon. Also good for keeping track of headaches, responses to different medications, and hopefully only one or two more periods.