AvisFV

AvisFV is a free, dedicated viewer for FITS files, the standard image format in astronomy and specialized fields like medical imaging. Designed for Windows 11, 10, 8, and 7, it also runs on Linux and macOS using WINE compatibility software. The name stands for 'Astro-vis Fits Viewer,' reflecting its primary use for astronomical data. This 100% free software provides a straightforward solution for professionals and enthusiasts to open, inspect, and analyze complex FITS images without cost, bridging a crucial need in scientific visualization.