CapyBro
Rewrite, fix, or translate text in any Windows app via a hotkey
...Two backends: **OpenRouter** (cloud — GPT-4o, Claude, Gemini, DeepSeek, your own key) or **Ollama** (fully local/offline — text never leaves the machine).
Native .NET 8 / WPF, ~48 MB, no Electron, zero telemetry. Unlimited custom prompts with per-prompt models, diff preview, history. UI in English, Ukrainian, Russian.
Free and open-source core (MIT). Optional one-time $19 Pro (never a subscription) for prompt packs, history export, settings backup and usage stats. Windows 10/11 x64.
Source: https://github.com/phantasmat2018/capy-bro
Site: https://capybro.app