Juicer - Juicer provides a solution to aggregate brands' hashtag and social media posts into a single social media feed on their website.
RSS.app - Monitor the web the way YOU want to.
Walls.io - Walls.io is an all-in-one social wall solution that allows you to collect, curate, and display content in an easy-to-customize feed. You can collect content from multiple social media platforms or let your audience post content directly on your wall.
FiveFilters Feed Creator - Create feed from elements (e.g. links) extracted from a given web page
Aggreto - Aggreto, a powerful social media aggregator tool and UGC platform that allows you content aggregation from multiple social networks (Facebook, Instagram, Twitter, etc.) for your events, website, and brands.
FetchRSS - Generate RSS out of any website.