Best Free and Open Source Alternatives to Corel AfterShot Pro

Corel AfterShot Pro is raw image processing software offering simple photo management, good workflow, and batch processing. It’s proprietary software available for Linux, Windows, and macOS. What are the best free and open source alternatives to Corel AfterShot Pro?

Corel has dabbled with Linux over the years. For example, they produced Corel Linux, a Debian-based distribution that bundled Corel WordPerfect Office for Linux. While Corel effectively abandoned its Linux business in 2001, they are not completely Linux-phobic.