Every day, interesting machine learning demos & papers are posted to HN, but they quickly disappear into the GitHub abyss if you don't immediately bookmark them. I've created a small collection of ML projects that stood out to me from HN, reddit, and GitHub. Preference was given to open source projects (so that you can jump right in and try them out yourself if the underlying idea appeals to you) and projects that had an online demo. Let me know if I missed a cool project/paper!