AMD Catalyst is designed to work with Microsoft's Windows operating system. It enables game developers to target multiple platforms with a single codebase. Catalyst also includes an unified driver that works with all versions of Windows, from XP to 10. You can download AMD Catalyst free from this page.
AMD Catalyst driver is a software suite that enables advanced 3D graphics and video features for AMD/ATI Radeon graphics cards. It includes the industry's first unified cross-vendor shader model, support for Microsoft® DirectX® 10.1 games and applications, and built-in support for HDCP content protection.
It also includes an updated control panel, new performance settings and support for the latest games and applications. Catalyst drivers are designed to improve performance and stability on your system, and to take advantage of all the features of your AMD graphics hardware.