If you develop a project that requires a web ajax file manager, then AjaXplorer is the thing you need. Having a similar to any OS out there, user can easily share files/folders over the internet easily. They can also preview and edit most common file formats directly without having to download or upload the files to their computer.
The ajax file manager is easy to use and most certainly every user would know his way around. AjaXplorer also comes fully equipped with a full a user management system and can also be interfaced with existing authentication mechanisms to make user life easier.