Bookmark managers with self-hosting
Shaarli is a self-hosted bookmark manager that you can install on your own server. It is mainly list-based and has the option of image previews.
This bookmark manager runs on the Nextcloud file backup provider which is similar to Dropbox but is self-hosted. The bookmark manager saves your bookmarks to your Nextcloud instance.
LinkAce is a self-hosted bookmark manager with a list-based user interface. Other features include tags and notes.
linkding is a tag-based self-hosted bookmarking option. It most resembles Delicious and is not heavy on design. However, you can customize your own design if you would like.
Wallabag is a read it later app for bookmarking articles and works on every device similar to Pocket.
Turtl uses powerful cryptography to encrypt your bookmarks to make them more secure. The user interface is visual-based and resembles Pinterest.
Buku is a powerful command line based bookmark manager that you install locally. There is also a server component that exposes a browsable front-end on a local web host server.