Handy, https://handy.computer/.
A free, open source, and extensible speech-to-text application that works completely offline.
> Handy is a cross-platform desktop application built with Tauri (Rust + React/TypeScript) that provides simple, privacy-focused speech transcription. Press a shortcut, speak, and have your words appear in any text field鈥攁ll without sending your voice to the cloud.