While the main application is paid, there are legitimate open-source projects on GitHub that interface with it, particularly for the Steam Deck
If you need the software to improve game performance: If you need the technical whitepapers/code: Search GitHub for "FidelityFX FSR" or "NVIDIA Image Scaling." lossless scaling download github hot
Decky plugin to streamline installation and usage of lsfg-vk; ... - GitHub While the main application is paid, there are