Mac: If you've decided to swear off of multitasking and want to focus on one thing at a time, Tic Toc is a handy to-do manager for Mac that lives in the menubar and only shows you one item at a time.

3 stars: "A qualified success; the positive aspects still outnumber the negative, but the weaknesses noticeably hinder the experience." Though it doesn’t quite disguise the lack of variety in puzzles ...