Painting planets such as Earth has been a prominent activity among Photoshop users, and now I present you what I have hunted. A tutorial for creating a realistic planet from Tozzy Design. I hope you love this one.
You can see the the full tutorial here.
This brush set is great for dirty images and somewhat creepy. There are only 2 packs of this but it has a high resolution. Its free although you have to register to the site. You can download it at photoshopforce.com
A cool collection of brushes if you want to create an abstract masterpiece. You can download it at getbrushes.com. There are 12 packs and each of which has its own theme. These brushes are free to use for all those who want to.