I've spent a little time looking over the beveling scripts for GIMP and while there are some nice ones available, none of them exactly fit my needs. So, I thought I'd try to improve on the
Add Bevel script included with GIMP.
GT Bevel is an improved version of GIMP’s
Add Bevel script. The user can select the slope type, as well as height, width & light direction. When selecting “Keep Layers”, the bevel will be placed on a separate layer.
Menu LocationFilters/Decor/GT Bevel


Curved Slope Bevel

Flat Slope Bevel (high depth)

The curved slope example is basically the same kind of result you can get from GIMP's
Add Bevel script, with a small width and low height.
The flat example is at full width (for that text) and with a medium height. Because this produced a darker result than I wanted, I increased the light distance (bump azimuth) to compensate. Perhaps that slider should be renamed to something more descriptive because
Light Distance doesn't seem to accurately describe the affect of the slider.
Download GT Bevel From GIMP Scripts Anyway, I would appreciate anyone who has the time to test out the script and post back their results. Comments and suggestions for improvement are welcomed. Thanks!