NVDA allows blind and vision impaired people to access and interact with the Windows operating system and many third party applications.
Cost / License
- Free
- Open Source
Platforms
- Windows

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 Thunder alternative is NVDA, which is both free and Open Source. Other great apps like Thunder are JAWS, Orca Screen Reader, Microsoft Narrator and System Access Standalone.
NVDA allows blind and vision impaired people to access and interact with the Windows operating system and many third party applications.

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.

Orca is a free, open source, flexible, and extensible screen reader that provides access to the graphical desktop via speech and refreshable braille.
Serotek’s System Access software brings you accessibility anywhere, and is available in configurations to meet every lifestyle and budget.
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.
GW Micro is an adaptive technology vendor, providing high quality solutions for blind and visually impaired.
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.