The following tools may offer a free trial or a limited free version, but may not be entirely free:

   1. Cascadeur
   2. Getrad.co
   3. Synthetik
   4. Audio2face
   5. Elize.ai

It's possible that some of these tools may have changed their pricing or features, it's always best to check their websites or contact their customer support for the most up-to-date information.
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