you must specify what you want to do to get good answer
photoshop is good for that kind of thing :D
There are a lot of software which can help you. The most famous are Photoshop, Corel Draw and so on.
u can go on foto flexar, picnic and photoshop
When two rainbows are put together in photoshop.
Photoshop can do this
If by flat pictures it is referring to Photoshop, then it is a tool used to glue layers together. This helps when adding textures and combining multiple images.
By using Photoshop or Picnik. And Apple also has some apps that will let you put fake piercings on pictures.
You can use Windows Paint and cut and paste the picture together or you can use Photoshop! :D
You can cut pictures into shapes on the computer by using Photoshop. Use the "crop" and "trim" functions in Photoshop.
Photoshop Filters > Liquify > Pucker tool... ------------------------ But I suggest the Gym
Yes, all you need is a software like photoshop and you can put anyone in any picture.
To edit and manipulate pictures, it has most of Photoshop features.