Thanks to Egmont’s The iPhone Arts facebook page, I noticed there are a few decent apps available for free today.
LongExpoPro This is a great camera app for long exposures that was highly recommended to me by Meri Walker, aka iPhone Art Girl. In my last article on IPS, I actually mentioned it as a slow shutter app that I use to create silky water. My favorite feature is the magic sharpener, which gives you the ability to sharpen parts of the photo, after creating your long exposure.
ALayer I have this one on my phone, but I can’t remember if I’ve used it or not. It’s free…grab it.