Although Stashmarks [1] seems dead, it had a pretty nice version of this much earlier. I personally now use Kifi [2] nowadays as Kippt [3] seems to be agonizing. The recent Raindrop.io [4] looks like a great newcomer although I'm sure many will have beef with it being Russia-made. Dragdis [5] looks great as well.
[1] http://www.stashmarks.com/
[2] https://www.kifi.com/
[3] https://kippt.com/
[4] https://raindrop.io/
[5] https://dragdis.com/
