Google launches a lot of free services and tools. Some of these work out, some don't. Some prove invaluable.

One I think is useful is their Documents Viewer which lets you view many file formats on websites online without having any corresponding program installed on your computer.

This can be very useful with certain file formats where you don't want to have to purchase a program, or run a very large program just to look at a file.

They've added several file types to their capability including Photoshop and Adobe Illustrator

Announcement: Twelve New File Formats in Google Docs Viewer

There's a mobile version of it as well.

The viewer is here: Google Docs Viewer