Buy ADOBE PHOTOSHOP

Adobe Photoshop is an image editing program that allows users to create, edit, and retouch photos and illustrations. It supports collaboration, allowing multiple users to work on the same document simultaneously. 
Features for interaction
Layer-based editing: Create and alter images with multiple overlays that support transparency 
Live co-editing: Multiple users can work on the same document at the same time 
Style presets: Create consistent brand assets 
Supports many file types: Works with many image and video file formats 
Keyboard shortcuts: Customize keyboard shortcuts to speed up workflow 
Touch gestures: Use touch gestures on compatible devices 
 
The minimum specs for Photoshop
 
Intel® Pentium® 4 or AMD Athlon® 64 processor (2 GHz or faster)
Microsoft® Windows® 7 with Service Pack 1, Windows 8, or Windows 8.1
2 GB of RAM (8 GB recommended)
2 GB of available hard-disk space for installation; additional free space required during installation (cannot install on removable flash storage devices)
1024x768 display (1280x800 recommended) with 16-bit color and 512 MB of VRAM (1 GB recommended)