Additor.io is described as 'Don't save it for later' and is an app in the Office & Productivity category. There are nine alternatives to Additor.io for a variety of platforms, including Online / Web-based, Google Chrome, SaaS, Firefox and Android. The best alternative is Raindrop.io, which is both free and Open Source. Other great apps like Additor.io are Bookmark Sidebar (Free, Open Source), Clipd.io (Free), LinkAce (Free, Open Source) and Highlights (Free).
Bookmark Sidebar is an extension for Chrome, which adds a toggleable sidebar with all your bookmarks on the left or right side of your screen. You can sort, edit, delete or rearrange your bookmarks easily from within the sidebar.
Clipd.io is a highly customizable Bookmarks Manager designed for the modern web. Clipd runs across all platforms and devices without having to download any apps. All the bookmarks are synced across all your devices.
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.
"Highlights - Highlighter and Web Clipper" chrome extension by Learning Paths, helps you organise your content across the internet. Highlight, Tag and add notes to relevant content across the internet.
Mix is a new way to discover and curate interesting content you find on the internet. We’re not (yet another) source for breaking news -- we take you deeper into the things that interest you most, and help you discover cool stuff.
Save, organize and tell stories with content from around the web. Save articles, videos, social media posts, podcasts, maps, online documents as well as your own images, notes and PDF's into visual collections.