ecto (Version 4)
for macOS 10.12 (Sierra) and macOS 10.13 (High Sierra)
There are many good reviews of ecto around the web. Here are some of them.
A recent review from a new user. ecto
A nice dual review of ecto and an RSS reader. Wired: Software That Rocks: Vienna RSS + Ecto
Switching to the Mac, and loves ecto. MobileMind: Applications I loved in 2007
An early review of ecto 3. Tim's Reflection Connection: ecto Rocks
Some of the best reiews come from ordinary non-computer-geek bloggers, like you. Boggled: ecto Rocks!
This might be the funniest ecto endorsement: Technorati doesn't hate me, I'm a moron and ecto rocks
This might be the shortest ecto review ever, but we like it. It's at the top of a very long post, don't miss the ecto review, because the rest of the post is really fun and might distract you. WWdN: In Exile