FreshRSS - FreshRSS is a free, self-hosted RSS aggregator.
UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.
Tiny Tiny RSS - Web-based news feed aggregator, designed to allow you to read news from any location, while feeling...
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Feedly - The content you need to accelerate your research, marketing, and sales.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.