Thunder is described as 'award-winning free screenreader talking software for people with little or no sight. It works well with Windows 7, Vista or XP. Thunder vailable all over the world in 8 languages and it really is absolutely free' and is an app in the OS & Utilities category. There are eight alternatives to Thunder for Windows, Linux, iPhone, iPad and Mac. The best alternative is NVDA, which is both free and Open Source. Other great apps like Thunder are JAWS (Paid), Microsoft Narrator (Free), Orca Screen Reader (Free, Open Source) and System Access Standalone (Paid).
A screen reader software for computer users whose vision loss prevents them from seeing screen content - JAWS reads aloud what's on the PC screen. Compatible with the most frequently-used workplace and classroom applications.
Developed for blind computer users, SuperNova Screen Reader is a software screen reader that works by reading the screen interactively and communicating through a speech synthesiser or a refreshable Braille display.
VoiceOver is a revolutionary built-in screen reader that’s more than a text-to-speech tool. It tells you exactly what’s on your screen and talks you through actions like editing a video, building a presentation, or quickly navigating between apps.