Bookmark managers with dead link resolver

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Save your bookmarks in a visual card-based fashion similar to Pinterest. Has social sharing features built in.
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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.
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Starpage is a traditional and fully featured start page with widgets. You can organize bookmarks along with widgets such as weather and news.
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Bookmark Ninja has a start page type layout and allows you to add categories, drag and drop, and use different column layouts.
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URL Manager Pro is a bookmark manager that resembles a file manager.