People that stacked Be Focused Pro
I reach for this product when I need an extra kick in the pants to focus. I love the global keyboard shortcut to start the next timer and the at-a-glance view of time remaining in the menubar. I happily paid the small fee because I've gotten so much value from it.
I actually don't pay for the pro version yet, but the free version is already great :) Simple, low-fuss, low-bandwidth Pomodoro timer for getting stuff done, with the ability to tie sprints to specific to-do list items.