Open source. Open possibilities.

Huey is a static, browser-based data exploration and analysis tool using DuckDB-WASM. Supports CSV, Parquet, JSON, XLSX, and DuckDB files with pivot tables, query builder, and derived attributes. Data stays local for privacy.

Excelize is a pure Go library for reading and writing Microsoft Excel spreadsheets in XLAM, XLSM, XLSX, XLTM and XLTX formats. It supports Excel 2007+ files, chart and image insertion, complex spreadsheet components, and a streaming API for large worksheets.

Talliark is an early-stage Excel add-in that keeps supporting PDF documents with a workbook and links worksheet cells to exact regions on a page, processing documents locally on Windows desktop Excel.