Google Gears

Gears is an open source project that enables more powerful web applications, by adding new features to your web browser: Let web applications interact naturally with your desktop. Store data locally in a fully-searchable database. Run JavaScript in the background to improve performance.
Price USD 0
License Free
Version 0.5
Operating System Windows, Windows XP, Windows Vista
System Requirements Firefox 1.5+ or Internet Explorer 6.0+