Create a membership site offering my own content

Hi, I'd like to know what theme do you use to create wpmudev.org? Is it available in your Themes section? Is it the same theme that permit to create the user's dashboard?

What plugin do you use to create :
- Community (Forum)
- Ask a Question (FAQ)
- Live Support
- To see the recent activity of the user ?

I'd like to offert eBooks, Videos and webinars to my community. What plugin will give me the possibility to create a section like «White label videos» to publish my content and also the section «Manuals».
Thank you for your answers,
Annie