I use Compiz in a Unity 2D session.

ubuntu@precise:~$ dpkg -l | grep -e compiz -e unity
ii  compiz                                 1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager
ii  compiz-core                            1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager
ii  compiz-dev                             1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager - development files
ii  compiz-gnome                           1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager - GNOME window decorator
ii  compiz-plugins                         1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager - plugins
ii  compiz-plugins-default                 1:0.9.7.6-0ubuntu1                      OpenGL window and compositing manager - default plugins
ii  compiz-plugins-extra                   0.9.7.0~bzr9-0ubuntu4                   Collection of extra plugins from OpenCompositing for Compiz
ii  compiz-plugins-livewallpapers          0.2.0-0~34~precise1                     Live Wallpaper like plugin(s) for Compiz.
ii  compiz-plugins-main                    1:0.9.7.0~bzr19-0ubuntu10               Compiz plugins - main collection
ii  compiz-plugins-main-default            1:0.9.7.0~bzr19-0ubuntu10               Compiz plugins - main default collection
ii  compizconfig-backend-gconf             0.9.5.92-0ubuntu4                       Compiz Fusion configuration system - gconf backend
ii  compizconfig-settings-manager          0.9.5.92-0ubuntu3                       Compiz configuration settings manager
ii  gir1.2-unity-5.0                       5.10.0-0ubuntu1                         GObject introspection data for the Unity library
ii  libcompizconfig0                       0.9.7.0~bzr428-0ubuntu6                 Settings library for plugins - OpenCompositing Project
ii  libmeanwhile1                          1.0.2-4ubuntu1                          open implementation of the Lotus Sametime Community Client protocol
ii  libunity-2d-private0                   5.10.0-0ubuntu1                         Unity 2D shared library
ii  libunity-core-5.0-5                    5.10.0-0ubuntu3                         Core library for the Unity interface.
ii  libunity-misc4                         4.0.4-0ubuntu2                          Miscellaneous functions for Unity - shared library
ii  libunity9                              5.10.0-0ubuntu1                         binding to get places into the launcher - shared library
ii  python-compizconfig                    0.9.5.94-0ubuntu4                       Compizconfig bindings for python
ii  unity                                  5.10.0-0ubuntu3                         Interface designed for efficiency of space and interaction.
ii  unity-2d                               5.10.0-0ubuntu1                         Unity interface for non-accelerated graphics cards
ii  unity-2d-common                        5.10.0-0ubuntu1                         Common files for Unity 2D Shell
ii  unity-2d-dbg                           5.10.0-0ubuntu1                         Debugging symbols for unity-2d
ii  unity-2d-panel                         5.10.0-0ubuntu1                         Unity 2D Panel
ii  unity-2d-shell                         5.10.0-0ubuntu1                         Dash and Launcher for the Unity 2D environment
ii  unity-2d-spread                        5.10.0-0ubuntu1                         Unity 2D Spread
ii  unity-asset-pool                       0.8.23-0ubuntu1                         Unity Assets Pool
ii  unity-common                           5.10.0-0ubuntu3                         Common files for the Unity interface.
ii  unity-greeter                          0.2.7-0ubuntu2                          Unity Greeter
ii  unity-lens-applications                5.10.0-0ubuntu1                         Application lens for unity
ii  unity-lens-files                       5.10.0-0ubuntu1                         File lens for unity
ii  unity-lens-music                       5.10.0-0ubuntu1                         Music lens for unity
ii  unity-lens-video                       0.3.5-0ubuntu1                          Unity Video lens
ii  unity-scope-musicstores                5.10.0-0ubuntu1                         Store music lens for unity
ii  unity-scope-video-remote               0.3.5-0ubuntu2                          Remote videos engine
ii  unity-services                         5.10.0-0ubuntu3                         Services for the Unity interface