It depends on how experienced you are with computers. GIMP (GNU Image Manipulation Program) has many tools but is not very unfriendly and shouldn't be used if you are inexperienced. Photoshop is a popular choice but is computer-intensive and expensive if you haven't already got it.
Your best option would be to bite the bullet and learn how to use GIMP, download free:
http://www.gimp.org/
The name of the Corel program that is used in photo editing is called Corel Draw or Corel Paintshop. Some other photo editing programs are: ACD Systems, Adobe Photoshop Lightroom 4, Apple Apeture 3.
The Capture One computer program is used for photo capturing and editing. It is a program which does a good job of importing digital images and specializes in the editing of them.
The most commonly used program for creating photo montages is Adobe Photoshop. This software is available from Adobe, Inc. as a standalone product, or as a part of the new Adobe Creative Cloud subscription service.
most used is black.
Kohl Aribic origin mixture of soot to darken eyes
Adobe PhotoShop is a Graphics and Photo Manipulation Program. It has many features, and is the most advanced and widely used Photo/Graphics program in the world. If you would like to purchase the program, it can cost a few hundred dollars. However, there is a Free Trial available, but will only last 30 days at the most.
If you use a light grade of mineral spirits you can darken stone. However, make sure you apply it lightly.
You would use the bold button.
Corel draw x4 is a great computer program used for creating and editing photographic images. It is often compared to Photoshop, as it is very helpful for people looking for a great photo editing program.
It's used primarily to darken part of an image.
KOHL
I know there are several free photo editing programs online, but I have only used one Piknik. They have many free options available, however to get the most out of the program there is a fee associated with it.