The nmtools - by t00fri and Robert Skuridin

The nmtools are a set of sophisticated command-line utilities enabling anyone to produce high-resolution normalmaps for use with Celestia.

The tools are available here - for Linux, OSX and Windows, together with a detailed tutorial. Also available is a forum where you may post your comments.

The Earth with a normalmap produced with the nmtools:


 

Click for full-size screenshot.

 

The newest version of the F-TexTools are always available for download in the Texture Tools Forum. You will also find a detailed tutorial for their usage here.

Statcounter