Advanced Bookmark Search - A fast offline search engine for bookmarks that supports searching operators
EverSync - Everhelper - Eversync
Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
LinkLocker - LinkLocker is a lightweight bookmarking service with an emphasis on privacy.
Floccus - Sync your web data across browsers and devices via your Nextcloud!