Description: Hypernotes is a free, open-source note taking and knowledge management software. It allows users to create wiki-style interconnected notes and build a personal knowledge base.
Type: software
Pricing: Free
Description: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.
Type: software
Pricing: Free