Diigo
A research-focused bookmarking tool with highlights and annotations.
Visit Diigo
Freemium
Diigo combines bookmarking with in-page highlighting, sticky notes and outliners aimed at research and study. Its free plan has limits, while paid plans expand highlights, storage and archiving.
Free plan
Cross-platform
Browser extension
Where Diigo appears
Read-It-Later Apps · for Researchers
The 5 Best Read-It-Later Apps for Researchers
Save, highlight and export sources you can actually cite later.
Highlighting & Notes · for ResearchersThe 4 Best Highlighting & Note Tools for Researchers
Capture the passages that matter and get them back out again.