Jotdown

Jotdown is an open-source document manager and PDF reader built for researchers, students and academics. Reading, annotating and organizing your documents works fully offline; network is only used for optional DOI citation import and dictionary downloads. Focused on privacy — no account required, no data leaves the device beyond what those optional features need.

Features:
* PDF reader with text-layer extraction
* OCR via open-source PdfBox
* Sticky note annotations and vector drawings (stylus + palm rejection)
* Academic citation (fichamento) generator
* Export to Markdown (.md), TXT and PDF
* ABNT citation format support
* Local folder organisation system
* Offline dictionary (Portuguese / English)
* Backup and restore (local ZIP)
* Dark mode support