Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Stash.ai - AI-powered, cross-device bookmarking
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Quicklinkr - Organize & Share your favorite links. Discover & Save new ones.
Marketing Optimizer - Optimize conversion rates, increase lead-to-close ratio, and resell leads easily. Includes complete WordPress integration.
Instapaper - Instapaper is a simple tool to save web pages for reading later.