Fidus Writer
Description: Fidus Writer is a free and open source online collaborative document editor. It allows real-time collaboration for writing documents like research papers, reports, books with features including comments, tracked changes, and export options.
Type: software
Pricing: Free
Notability
Description: Notability is a popular note-taking and annotation app for iOS and macOS. It allows users to take handwritten notes, type notes, record audio, annotate PDFs and more. Key features include advanced organization with search and tagging, auto-backup to the cloud, and easy sharing options.
Type: software
Pricing: Paid