searq.org

SearQ, the RSS search engine that is both speedy and free! SearQ offers a RESTful API that simplifies the search for data from RSS feeds. Finding what you need has never been easier with SearQ. Maintained by davidesantangelo on GitHub, where it has earned 95 stars from the community.

It's actively developed around api, rss, news, and is a solid reference for anyone building with these tools.