Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
WebCull - WebCull is an ad-free, privacy-focused bookmark manager that works from any browser or device.
IsYourLinkSad? - Is Your Link Sad. Make It Happy. Share your URLs to people who actually care.
Save For Later - Allows you to bookmark any website to read later.
The Bored Hoard - Sieve the web for cool websites you probably never knew existed. Supporting the smaller independent sites that Google ignores. All revealed in a weekly box delivered online every Friday.
Purify - Read news articles with minimal distraction and scrolling.