Installing all of these extensions manually can be quite a tedious task as there is no multiple install functionality in the Joomla installer component and there doesn't appear to be any other components out there that can achieve this. Because of this I took it upon myself to write the Multi Install component (com_multiinstall). This will allow you to install as many extensions as you want at once. All you need to do is bundle all of the extensions you want to install into a zip archive and then upload it from the component view.< br/>
Here is an example of a zip archive I made:
And here is the result:
Not all extensions will work as well as this as some have custom install files that redirect back to com_install or other files (ModulesAnywhere, Jomsocial, Community Builder etc). If this happens, simply remove those extensions from your zip file and try again.
To get the extension all you need to do is register. Hopefully this will prove useful for some of you out there!
You can see a tutorial video here.