OCCT is described as 'all-in-one stability check & stress test tool. OCCT is great at generating heavy loads on your components ( CPU, GPU, Memory, GPU Memory & Power supply ), and aims at detecting hardware errors or stability issues faster than anything else' and is an app in the OS & Utilities category. There are nine alternatives to OCCT for a variety of platforms, including Windows, Linux, Android, Mac and iPhone. The best alternative is AIDA64. It's not free, so if you're looking for a free alternative, you could try HeavyLoad or Prime95. Other great apps like OCCT are 3C Toolbox (Freemium), Linpack Xtreme (Free), System Stability Tester (Free, Open Source) and LinX (Free).