Realmac Software has released the Clear App for Mac. It requires Mac OS X 10.8.2 Mountain Lion or higher.
It’s a “list and to-do app.” Clear App has the ability to store your lists in iCloud which allows you to manage your lists on both iOS and OS X. It also sports a gesturally-driven way to switch lists, and pasting of multiple tasks into a list.
Clear for Mac is available exclusively on the Mac App Store. It’s available for US$6.99 for a limited time. To download and purchase go to https://itunes.apple.com/us/app/clear/id504544917?ls=1&mt=12 .