Ask HN: List of bookmarking services?

We've recently been seeing a good number of new bookmarking services showing up (or launching) here on HN. Most of them do the same things (sync, import, export) with some variation of added or redacted features.

There was an interesting one posted today called Tinmark. It looked good and promising but I was trying to remember what some of the other known ones were. Here's the list I came up with off the top of my head, please add more if you know...

Pinboard

Delicious

Evernote

Historious

Diigo