No specific info about version 5.9. Please visit the main page of Google 桌面 on Software Informer.
Comes in handy for users who work with Google search on a daily basis.
Google Talk is an instant messaging and chatting application.
The Google Data APIs is protocol for reading and writing data on the web.
Add a calendar to the side bar of Google Desktop Search
Google It! is a widget used to search the content of your clipboard on Google.
DesktopMirror for Google and ACT! lets you synchronize information.