Description: LiquidText is a PDF reader and annotator designed for active reading, analysis and research. It allows users to easily highlight, excerpt, organize and share passages from PDF articles and documents.
Type: software
Description: Visavis is a free and open-source digital whiteboard and online collaboration software. It allows real-time collaboration for teams to brainstorm ideas, sketch diagrams, share screens, and annotate on a virtual whiteboard from any device.
Type: software
Pricing: Open Source