Sculptris

Sculptris was a revolutionary digital sculpting tool that made high-end sculpting accessible to everyone. It was eventually acquired by Pixologic (the makers of ZBrush) and served as the inspiration for many of ZBrush's modern features. While it is no longer updated and has been largely superseded by modern tools like Blender's sculpting mode, it remains a nostalgic favorite for many artists. It is still a very capable tool for simple sculpting, but its lack of updates and compatibility issues with modern OS make it a lower-ranked choice today.