Activate Application Window on clicking dock icon
No, there is not. Expose is built in to the core of OS X. You cannot replace it, but you can turn it off in the System Preferences. As far as I know there is no third party Expose for OS X. 

Ubuntu is probably using a similar version of expose used in earlier versions of OS X. Most operating systems implemented such a thing a few years after the first time OS X was published with that functionality. It changed over the years (and is now mostly taken over by Mission Control), but the ones used in other operating systems might not have taken the same path.