#Open Source Reader
Koodo Reader
Koodo Reader is an open-source e-book reader supporting multiple formats such as EPUB and PDF, featuring cross-platform synchronization, personalized reading experience, and efficient management of your personal book library.
Skim
Skim is a lightweight, open-source PDF reader and annotation tool for macOS, specifically designed for in-depth reading of academic literature. It supports various annotation modes, LaTeX/BibTeX integration, and offers presentation mode along with centralized note management, meeting the efficient reading needs of researchers and students.
Vienna
Vienna is a free, open-source RSS/Atom reader designed specifically for macOS, featuring intelligent folder management, an integrated browser, offline reading, and OPML synchronization. With a clean and efficient interface and fully local operation to ensure privacy, it is an ideal choice for Mac users seeking online news and content.