Comment by dbodin11

I built my own https://www.kontxt.io and hit the front page of HN not too long ago. It's a modern hybrid productivity and social bookmarking / news / knowledge aggregation service. Think social web layer with CMS and social network. You can save the site / pdf (link or archive), engage with highlights, comments, and polls. There's privacy controls. It's searchable. Everything can be organized with tags as well as folders. You can join groups and follow people to discover shared content. Highlights can be shared natively to popular social platforms and observed with analytics. User's can also set a personal promotion with what they share as an added benefit and incentive to provide value.