You should go to the website for more information and I will provide you the download links, just click the links and you will automaticaly forwarded to the download page, the current version is v2.0.0-beta3.1 and the beta version is v2.0.0-beta3.1 . I will give you the download link of the current version v2.0.0-beta3.1:
1. The Cairo Dock Plugins (DEB)
2. Cairo Dock sources (tar.bz2)
3. Cairo Dock (DEB)
You MUST install the cairo dock plugins and cairo dock (DEB), for the installer you also can use the sources code or just the installer(DEB).
Launch it from Applications->System Tools->Cairo-Dock. The first time Cairo-Dock is run, it will open the Manage Themes dialog. Select a theme and click OK. The dock will then launch.
Right-click on the dock to access configuration, as well as add and remove launchers.