Hi Nicole --
A while back you and I had an exchange about GIMP tutorials, and I think I was going to pass some links along to you, which I never did.
Your recent additions to the sticky jogged my memory. Here are some of the ones I use most, in no particular order. Most of these are from
gimpguru.org,
which is a good resource; there is also a large clearing-house type site (look for the "Select Category" drop menu on right and pick the photo ones)
here.
Toning BW images (a good one)
Contrast mask/Tone Mapping
Orton Effect and Another one
Digital Neutral Density Filter (another good one -- learned how to use masks and gradients here)
Exposure Blending
Lomo Effect (found this disappointing compared to PS versions)
Black and white conversion (another good one)
Selective Colorization
Local Contrast Enhancement
The two "script-fus" (GIMP for action) I find indispensable are Smart Sharpening Redux (what it sounds like -- really works well) and GreyCstoration (for noise removal). Get them
here.
EL