Yoyogi an anti-timeline Mastodon client
Intrigued by Yoyogi an early experiment in threaded browsing of a mastodon account's following from @22@octodon.social
They directly cite Google Reader as an inspiration, in the sense that it “elevates the author” as the primary organization, and you read down through an author's threads. I can see categories from authors (hashtags) or you (lists) layering on top of this nicely.
Currently it is intentional about being a read-only interface. This simplifies a lot of interface challenges in merging discussion with reading, though as with my use of Reader the ability to boost or fave from here feels necessary as an interaction while reading.