Sophosia

Reference manager combining PDF reading/annotation with markdown and Excalidraw note-taking for research.

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Sophosia is an open-source reference manager for researchers that combines a built-in PDF reader and annotator with markdown and Excalidraw note-taking, linking notes directly to the papers and projects they relate to. It's designed for managing citations, reading, and note-taking in one desktop app. It's aimed at academic and STEM researchers rather than casual PDF readers.

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