Must have applications for power Exchange users?

[Rosewood]

I use the Exchange server functions of Windows Mobile devices every single day. I could not get by with out them. However, I find the built in tools for Mail, Calendar, Tasks, and Contacts to be quite lacking and I'm not the only one.

So I'm wondering what great applications and tweaks there are out there for power users. Some of the stuff I want to do shouldn't be that hard.

* Being able to view more than one calendar from an Exchange server, including another user's calendar.
* Being able to view how many unread messages are in my other synchronized folders. (I used to use SPB's Pocket Diary for that but that doesn't play well with Manilla or Titanium)
* Being able to open multiple contact lists from Exchange

And I'm open to other suggestions. PIM applications people find to be must haves like I found SPB Diary to be for all of those years.