Here are some GIMP curves available for download
http://www.photoshopblur.com/21-gimp-cu ... ve-missed/For those unfamiliar with how to use curve presets:
1. Download curves and unpack in ~.gimp-2.x/curves folder.
2. Open image in GIMP. In Colors>Curves click on a button with small arrow on the right side, then Import_Settings_from_File.
It will take you to the curves folder, where you just copied your GIMP curve files.
3. Choose curve file, click Open
4. You're going to be able to see immediate changes to you image.
5. If you like curve preset, you can add it to your Faves (next to Import button)
Here is a collection of 52 GIMP curves that I have, including converted Photoshop curves.
Attachment:
Curves.7z
You can also play with curves in G'MIC which has a good choice of controls and even save a preset to the Faves.
Cheers
K1TE