Bookmark Ninja is described as 'Access your bookmarks on any device (desktop, notebook, mobile) in any browser All your bookmarks are kept private, Bookmark Ninja is not a social bookmarking site' and is a bookmark manager in the web browsers category. There are more than 100 alternatives to Bookmark Ninja, not only websites but also apps for a variety of platforms, including Google Chrome, Windows, Mozilla Firefox and Mac apps. The best Bookmark Ninja alternative is Raindrop.io, which is free. Other great sites and apps similar to Bookmark Ninja are Linkwarden, Diigo, NewsBlur and Fabric Internet OS.
Capture and organize bookmarks and associated content like articles, photos, and more with Raindrop.io. Enjoy real-time collaboration, privacy focus, web clipper, and sync across devices without ads.
A fully self-hostable, open-source collaborative bookmark manager to collect, organize and archive webpages.
Save web resources, annotate pages and PDFs, highlight and add sticky notes, organize collections with Outliner, sync across devices, filter by tags and folders, share with groups, and access advanced search and flexible privacy for individual or collaborative research projects.
NewsBlur is a personal news reader that brings people together to talk about the world. It shows you the original site and allows you to read stories directly off the site while keeping track of what you read. It also filters and highlights stories you like and dislike.
Comprehensive AI-powered storage system featuring semantic search, automatic data organization, syncing across devices, collaborative workspaces, annotation for files and websites, real-time sharing, direct linking, and integration of drives, links, and notes.
AI-Powered Bookmark Manager for Teams, Linkinize is the central hub for your team’s bookmarks
Organize, search, and securely share bookmarks across your team. faster onboarding, zero chaos. Automatically generate titles, descriptions, and smart tags with AI.
A URL bookmarking app, featuring deep integration into the OS, iCloud Sync, extensive Siri Shortcuts actions, and a stunning user interface that makes it a joy to use and feels like home.
The Old Reader is a web based RSS reader, something like Google Reader . Import existing subscriptions, find Facebook friends and more.
LinkAce is meant to provide a long-term archive of links to websites, media files or anything else which has a valid URL. Store interesting articles, neat web tools or libraries you may use sometime in the future.
ClipKeep is a simple web clipper that simplifies how you save, organize, and access digital insights. Capture web pages effortlessly, categorize your content, and retrieve it instantly—all with just a click.
Pearltrees is a social curation tool. It lets you organize, discover and share the stuff you like on the web.
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Hefty 558mb app appears to be required to use.