Dicio is a free and open source voice assistant. It supports many different skills and input/output methods, and it provides both speech and graphical feedback to a question. It uses Vosk for speech to text. It has multilanguage support, and is currently available in Czech, English, French, German, Greek, Italian, Russian, Slovenian and Spanish, Ukrainian.

Anti-Features:
NonFreeNet (this application promotes/depends a non-Free network service):
⇒ Accesses APIs of Genius, OpenWeatherMap and Duck