knockshore 

PDF OCR extraction layer — C# port of the Python extract_text_from_pdf_ocr logic using Tesseract.

Block-level diff engine for PDF documents — compares PageBlock objects extracted by KiteSky.PDF and produces structured diff results ready for HTML rendering.

Pattern-aware PDF text diff engine and block-level diff renderer.

Omaha - Custom SkiaSharp-based 2D UI framework with controls, layout, event system, and theming