Spillo
bananafishsoftware.com/products/spillo
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Spillo is a powerful, beautiful and amazingly fast Pinboard client for OS X. Spillo lets you browse and organize your bookmarks in a stunning modern interface. Spillo also makes creating a bookmark from anywhere on your Mac as convenient as possible.