opening-explorer

Your chess, in plain files — a self-hosted chess workbench: engine analysis, studies, notes, games, and book-fed puzzles

Native macOS chess database — a lightweight ChessBase alternative. Browse, annotate and analyze PGN collections with a bundled Stockfish. Swift + Rust.

The Lichess analysis tree — turbocharged, optimized, and packaged as a standalone npm library with full PGN import/export.

Caissa Codex — a free reference of the 3,690 named chess opening lines, with Lichess statistics (chesscodex.org)

Offline-first chess analysis desktop app for Windows: native UCI engines, an offline opening explorer, and move sounds.

Desktop chess board with live Stockfish analysis and a personal game database (PySide6)

You already know 1.e4. This tells you who to blame for it.