Skim: Open-source Windows email client with BYOK AI ships under 5MB

Skim is a free, MIT-licensed email client for Windows that lets users bring their own AI key for features like style-matching replies and inbox search. The installer is under 5MB, built with Tauri 2 and Rust, and treats HTML email as hostile with triple-layer sanitization. It offers keyboard-first controls and a minimalistic interface, aiming to replace bloated alternatives like Outlook.