FreeMind
Description: FreeMind is an open source mind mapping and knowledge management software. It allows users to visually organize ideas, tasks, and concepts in a node-based map.
Type: software
Pricing: Free
Readwise
Description: Readwise is a read-later app that helps you track, organize and review highlights from articles, books and websites. It syncs highlights from Kindle and Pocket automatically, allowing you to easily revisit your highlights later.
Type: software