Hi all… I found a pretty neat FREE program to make planet textures. Its located here: http://blog.texturesforplanets.com/
It has some pretty cool texture packs as well that you could download… Anyway, enjoy!
teak
Looks good. I have tried in the past finding such software. There are some, but always a bloated nightmare.
Thanks for the link 
Grand Design on Steam is also very good…But, its 70 bucks for the PRO version… i’m beta testing the latest, and the author has made a ton of improvements… worth checking out if you need more sophisticated stuff.
teak