Browser application & local file system access

Question

I want to enhance my browser-based web application with functionality that enables management of local files and folders. E.g. folder tree structures should be synchronized

Answer 1

Google Gears.

it lets you write Javascript applications with a much bigger platform support than the usual browser, and go 'unconnected' with local file access, cache and DB. and if/when connected it syncs to the central server.

available for several browsers on all platforms; but still under heavy evolution.