Description: pdf-notes is a free, open source software for annotating PDF files on Windows, Mac and Linux. It allows adding text notes, highlights, drawings and stamps to PDFs.
Type: software
Pricing: Open Source
Description: Xmind is a mind mapping and brainstorming software. It allows users to visually organize ideas, concepts, and information in a free-flowing map. Key features include tree, org chart, fishbone diagrams, adding images, links, notes and more.
Type: software