Wake Up Time for Mac OS X - Alarm Clock
Category: Mac OS X Utility, Alarm Clock, Full Screen Clock, Time Clock Software for Mac

For the display: use 24-hour checkbox in the Preferences.

For alarm time setting: the app follows your System settings. You can customize that in Times settings at Language & Texts in System Preferences.

rockysandstudio.com
Category: News, Feedly, Feedbin, RSS
Compatibility: MAC OS X Yosemite, El Capitan
Newsflow: News Reader for Mac OS X (Yosemite, El Capitan)

Newsflow brings news from all of your favourite websites right to your desktop. Enjoy your articles in a fast, fluent and highly customizable news reader.