For those who do not have Photoshop, GIMP is an excellent (and free) alternative. While there are not as many online resources and tutorials as there are for Photoshop users, GIMP users do have a number of quality tutorials to help in their own learning. In this post we’ll showcase 35 of the best tutorials for GIMP. Some of them are adaptations of popular Photoshop tutorials that show how to replicate the process in GIMP.
Design an Apple iPhone Advertisement in GIMP
Add HDR-Like Effect to a Normal Portrait Picture
The Ultimate GIMP Planet Tutorial
GIMP Cool Shapes Effect Tutorial
Digital Blending – Dynamic Range – GIMP
How to Create Lightsaber Effects
Super Glowy Rainbow Text Effect (video)
Enhance Colors Using HSV Components
Easy Way to Create Light Effects in GIMP
Masking Hair with Fine Strands
Perfect Masking Using a Highpass
How to Create and Use a Layer Mask
Leopard’s Aurora Borealis Wallpaper in GIMP
Creating a Vista-Like Wallpaper
Splash Screen: Create a Colorful Stream of Light with Particles
Caintech.co.uk 
I have a tutorial that shows you how to make objects levitate.
Let me know what you think. =)
As you can see from some on the tutorials on my site I am a big fan of photo manipulation and I think your tutorial is one of the top ones.
Well done keep up the good work.
Thanks a lot. =)