Socialise is an Zikuka module to integrate Web 2.0 services like Facebook, Google+ or Twitter in your Website.
All downloads are available here.
To install Socialise simply unpack the distribution inside your Zikula modules directory. This will create the ./modules/Socialise directory and should contain all the files of the distribution. (note: if you downloaded your module from the Zikula Extensions database, then you should unpack your module from your Zikula root directory.)
Now, enter the administration portion of your Zikula site:
You should now have a fully functioning Socialise installation.