Anxiety: Nice little to-do list for your menubar. It drastically reduced my need for post-its.
Hush: Automatically mutes Hulu ads (Chrome AdBlock doesn't seem to block them.)
Circus Ponies NoteBook: Best notebook app I've used, and I've tried a lot of them. It's a bit difficult to explain why it's better without actually trying it. It indexes all of your notes, it's really easy to re-order bullet points, and 'List Mode' (instead of default 'Paragraph Mode') makes taking notes in class super easy.