Learncroc
Short, playable lessons with spaced review, built from the docs you must know
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KnowNote
Ask questions of your own documents on your desktop, with every answer cited
If NotebookLM is off the table for confidentiality reasons, this gives you cited answers over your files with retrieval that never leaves the laptop.
KnowNote is a desktop app for Windows and Apple Silicon Macs: load PDFs, Word files, slide decks or web pages, ask a question, and each answer points to the passage and location it drew from. Retrieval runs locally, and there is no Docker setup or account. Past questions and their evidence accumulate into an index you can revisit. GPL-3.0, around 1,150 GitHub stars, version 1.3 downloadable now.
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