Ginn
Ginn Information
Ginn is a deamon with jinn-like wish-granting capabilities: it gives applications the ability to support a subset of multi-touch gestures without having to integrate uTouch-GEIS or multi-touch-enabled GTK/Qt libraries.
"GINN" is a backronym standing for "Gesture Injector: No-GEIS, No-Toolkits" 
Ginn links:
Supporting Unity Gestures Effect using Ginn
If you want to just use the standard gnome Desktop and still get some gestures effects stuff, you can use Ginn to assign gestures in the global section to Compiz Shortcuts to get the same effects as those supported in Unity.
Zoom out the virtual desktop (4-tap): 4-fingers-Tap -> Super+E.
<wish gesture="Tap" fingers="4">
<action name="action1" when="update">
<trigger prop="tap time" min="20" max="400"/> <key modifier1="Super_L">E</key>
</action>
</wish>
Bring up all windows (3-pinch): 3-fingers-Pinch -> Super+W
<wish gesture="Pinch" fingers="3">
<action name="action4" when="update">
<trigger prop="radius delta" min="-80" max="-50"/> <key modifier1="Super_L">W</key>
</action>
</wish>
Demos
How to support right-click in Ginn
Note: This needs to get moved into an LP Question ("Answers").
Ginn supports injecting keyboard clicks and mouse buttons.
If you have some problems getting right click to work, you can use this trick:
Configure a new global keyboard shortcut in ubuntu as explained here
Apply a new shortcut executing xdotool to inject the right button : Name: NewCommand ; COMMAND: xdotool click 3 ; SHORTCUT: Put your shortcut here
- Add the SHORTCUT you have selected in the wishes file, and associate it to 2-fingers tap for example.
You need xdotool to get this working