I've been dreaming of a platform where each post is categorized (manually, by choosing a circle/channel, or automatically detected), as I'm not interested in al

I've been dreaming of a platform where each post is categorized (manually, by choosing a circle/channel, or automatically detected), as I'm not interested in all the content / themes of people I'd follow. Besides G+, I remember Pownce had a similar feature. It would also be helpful to be able to choose your feed sorting algorithm - chronologically or else.