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Hover Zoom - Enlarge thumbnails on mouse over.
Pocket - When you find something you want to view later, put it in Pocket.
Hover Zoom+ - Google Chrome extension for zooming images on mouse hover - extesy/hoverzoom
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...
wallabag - Save the web, freely.