This is not my script, I just found it and felt it should have a link from the registry:
It converts Photoshop curves files to Gimp format.
python2 acv2gimp.py mycurve.acv -o ~/.gimp-2.8/curves/mycurve.crv
This script is used to draw user defined or library parametric curves.
A simple java like math language is used to define curves or families of curves in GIMP layers. These can be exported to animated GIF's, SVG path, or included in GIMP images.
Info and questions:
This plugin calculates the color curve from two different pictures (Original and Modified).
Build and install it with:
$ gimptool-2.0 --install elsamuko-get-curves.c