linkding is a simple bookmark service that you can host yourself. It supports managing bookmarks, categorizing them with tags and has a search function. It provides a bookmarklet for quickly adding new bookmarks while browsing the web. It also supports import / export of bookmarks in the Netscape HTML format.
Shiori is a simple bookmarks manager written in Go language. Intended as a simple clone of Pocket. You can use it as command line application or as web application. This application is distributed as a single binary, which means it can be installed and used easily.