Try RenderPal it's free and does a great job been using it for years and can highly recommend it.
It's not free actually. From their page:
Here you can download free, fully functional evaluation versions of RenderPal V2. The trial period is limited to 30 days; after this, you will either have to purchase a license or register for a free 3 nodes license in order to continue using RenderPal V2.
Source: https://www.renderpal.com/d_renderpal.php
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