Google has had some products that are involved in the mobile marketplace, well now you can get a custom set of these apps sent directly to your phone.
Google recognizes what type of phone you have and you can download these apps directly to your phone. On my Blackberry it downloaded all of the above apps. With the exception of Google Maps, the icons simply link to the corresponding mobile page of the Google site (ie. GMail icon links to m.gmail.com). That part is sort of cheesy, but Google Maps for the BB is pretty fricken sweet.