If you ever find your brain trying to interrupt what you're doing with a "helpful" reminder that you need to do something else, Do It can help you regain your focus. It's simple: Click the menu bar icon, select a number of minutes for your reminder, and then fill in the details. Alerts can be a window, annoying sound, or both, and Do It can open a file or application for you too. The countdown in the menu bar is a bit distracting, but can't be turned off. And Do It only uses minutes; we'd like an option for hours or days without having to convert them to minutes manually.
Positives
Simple UI. Handy presets. Can also open a file or application.
Negatives
Only deals in minutes; it'd be nice to be able to specify hours or days without having to do math. Distracting countdown in menu bar can't be disabled. Can't choose sounds.