Shameless plug: We created https://contentgems.com https://contentgems.com as a feed reader on steroids: You can follow feeds, however you can also filter them

Shameless plug: We created https://contentgems.com https://contentgems.com as a feed reader on steroids: You can follow feeds, however you can also filter them based on powerful keyword based search (and other params). You can follow the CG firehose (tens of thousands of feeds we follow and index for you), to discover new feeds. And then you can curate and share the best articles from CG. It's a mashup of Feedly, Google Alerts, Buffer, and IFTTT/Zapier.