What are some alternatives?
When comparing Newslines and Newzmate, you can also consider the following products
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
QuiteRSS - Cross-platform RSS/Atom news feed reader written using Qt.
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
Feedly - The content you need to accelerate your research, marketing, and sales.
Sutori - Sutori is the easiest way to create an interactive story collaboratively.
NewsBlur - NewsBlur is a personal news reader that brings people together to talk about the world.