I think I've tried every single camera app for the iPhone to date. But
the one I have on my home screen is Camera+. I think for mojos it's an
ideal tool as it allows you to shoot fast and process later. Plus, all
the images you shoot with it don't end up in your Camera Roll unless
you save them there.

The app also has a lot of features of other apps folded into it. It
has image stabilization, cropping, filter sets and framing tools. It
also zooms and has a unique two-finger feature that lets you focus on
one part of an image and expose for another. You can also easily share
images to facebook, twitter and flickr. And, the upload and sharing is
super fast. Images you share on Twitter get sent to Camera+'s own site and are presented in their full rez glory. Great for getting field work in front of an audience rapidly.

Here's a shot I took in Camera+ with a pseudo HDR (High Dynamic Range)
filter applied. 

Combine Camera+ with the amazing iPhone4 camera and you have a perfect
mojo photo tool, I think. I hope they'll add some control over the strength of the filters and an ability to send images to multiple social networks at the same time.