Episteme is an open source, multi-platform document and e-book reader app. It's offline-first, ad-free, and respects your privacy. Supported Formats: Documents: PDF, DOCX, ODT/FODT E-books: EPUB, MOBI, AZW3, FB2 Comics: CBR, CBZ, CB7 Plain Text: MD, TXT, HTML Key Features: PDF Annotations: You can draw directly on pages using a pen or...