Witsy

MarkItDown is a lightweight Python utility for converting various files and office documents to Markdown, designed for use with large language models (LLMs) and text analysis pipelines. It preserves document structure like headings, lists, tables, and links, making it ideal for AI applications. Supports PDF, PowerPoint, Word, Excel, images (with OCR), audio (with transcription), HTML, text formats, ZIP, YouTube, and EPub.

Streamlit is an open-source app framework that turns Python scripts into shareable web apps in minutes. It enables data scientists and AI/ML engineers to build interactive data apps like dashboards, reports, or chat apps using pure Python, without front-end experience.

LEANN is the world's smallest vector index, enabling RAG on everything from documents to chat histories with 97% storage savings, no accuracy loss, and 100% privacy on personal devices. It uses graph-based selective recomputation and high-degree preserving pruning for lightweight, scalable semantic search.