Advanced Bookmark Search - A fast offline search engine for bookmarks that supports searching operators
Shaarli - Shaarli is a minimalist link sharing software you can install on your own website
Unmark - Hosted bookmark management app
Pocket - When you find something you want to view later, put it in Pocket.
wallabag - Save the web, freely.
LinkLocker - LinkLocker is a lightweight bookmarking service with an emphasis on privacy.