Things 3 was recently released. MacStories has a good run-down:

An app’s visual design is, in many ways, a matter of preference. But as far as I’m concerned, you would be hard-pressed to find a better looking to-do app than Things. The first time I opened it on my iPad, I couldn’t help but pause a few moments to admire it. And while that initial sense of awe wore off after a few days of use, its residual impact can be judged by the way Things has ruined other apps for me. Things 2 looks archaic by comparison, and even more modern task managers like Todoist and 2Do appear dated after using Things 3. The only task manager I’ve come across that feels like it’s from the same design era is Microsoft’s successor to Wunderlist, To-Do.

This is the to-do/task manager app I most recommend. I, personally, still use Omnifocus, but that’s because I’m a crazy person and have pretty specific way I manage tasks. But, for most people … Things 3 is the way to go.