MachineCodex Software (http://machinecodex.com/software.php) has released DateLine 1.0 on the Mac App Store. It’s a linear desktop calendar that costs US$7.99 and is found in the Productivity category.
With Dateline, you can see your events and tasks in a floating window. You can add a customizable hot key to quickly access the app. Dateline syncs with iCal, BusyCal and other Mac calendaring apps.
It’s been localized for English, French, Italian, Japanese, German and Portuguese. Dateline has support for all calendar formats and locales. You can double click on a day to jump to your calendar app.