- Twitter (only social search, though many wants the account feed)
- Facebook (dunno what this does)
- Online users
- RawHyperText (HTML block, simply loads a template with css)
- Recent News
- Recent Threads
- Share page
- Status updates
Those are the core ones, some are just reproducing the standard forum homepage blocks (share, online users, forum stats is a bit different though, it shows most online as well).
BTW, does this support promote article? I have been meaning to test it out, but I just haven't had the time to do it.