fLUTe is a small GUI utility written in Python to open and edit LUTs (Look Up Tables) in (8-bits RGB format)[https://en.wikipedia.org/wiki/RGB_color_model#Numeric_representations].
You can get sample LUTs here: http://rsb.info.nih.gov/ij/download/luts/luts.zip http://rsb.info.nih.gov/ij/download/luts/luts2.zip
The GUI frontend has not (yet) been decided, but chances are on Qt's side.