Photivo is a free and open source (GPL3) photo processor. It handles your RAW files as well as your bitmap files. Developed by Michael Munzert
License: Open Source
Photivo is a free and open-source tool favored for its customization and community support, making it suitable for users with a strong technical background. In contrast, Adobe Photoshop Lightroom offers a more polished experience with professional-grade features, seamless integration within the Adobe ecosystem, but comes with a subscription cost.