Safari 5.1.7

Apple Inc - 36.71MB (Freeware)
      Features included:

• Safari features built-in support for Apple’s VoiceOver screen reader in OS X. VoiceOver describes aloud what appears on your screen and reads the text and links of websites.
• Safari supports Accessible Rich Internet Applications (ARIA). The ARIA standard helps web developers make dynamic web content more accessible for people with disabilities.
  
  Safari 5.1.7

• Zoom in or out on web content using keyboard shortcuts, Multi-Touch gestures, or the Zoom toolbar button for more comfortable reading.
• Safari can store audio and video data for web applications that use the HTML5 application cache, allowing for offline media playback and better media performance when an Internet connection is slow.
• The Nitro JavaScript engine is an advanced bytecode JavaScript engine that makes web browsing even faster, and it’s what powers Safari on the Mac, PCs, and iOS devices      

More features at:

http://www.apple.com/safari/features.html