Free opensource alternative of Photoshop freeware photo-editing software

As most of us are well aware of the idea that technology is free and all of must get best out of it.

Today I will discuss about opensource photo editing software available. But again I must say that we must support those intelligent developers who choose to go for open source for greater developments of our society. So do support them by simply donating as much as you can.

Photoshop is one of the most well developed and well known software in the market of photo-editing.
But there are freeware available with most of it's features available in them.

1.  GIMP
2. Krita
 
1. GIMP


      GIMP is best freeware alternative of Phtoshop. It has most of the great features of Photoshop in it. Some of the features available in it are as follows.
  • Painting
    • Full suite of painting tools including Brush, Pencil, Airbrush, Clone, etc.
    • Sub-pixel sampling for all paint tools for high quality anti-aliasing
    • Extremely powerful gradient editor and blend tool
    • Supports custom brushes and patterns
  • System
    • Tile based memory management so image size is limited only by available disk space
    • Virtually unlimited number of images open at one time
  • Advanced Manipulation
    • Full alpha channel support
    • Layers and channels
    • Multiple Undo/Redo (limited only by diskspace)
    • Editable text layers
    • Transformation tools including rotate, scale, shear and flip
    • Selection tools including rectangle, rounded rectangle, ellipse, free, fuzzy
    • Foreground extraction tool
    • Advanced path tool doing bezier and polygonal selections.
    • Transformable paths, transformable selections.
    • Quickmask to paint a selection.
  • Extensible
    • A Procedural Database for calling internal GIMP functions from external programs as in Script-fu
    • Advanced scripting capabilities (Scheme, Python, Perl)
    • Plug-ins which allow for the easy addition of new file formats and new effect filters
    • Over 100 plug-ins already available
  • Animation
    • Load and save animations in a convenient frame-as-layer format
    • MNG support
    • Frame Navigator (in GAP, the GIMP Animation Package)
    • Onion Skin (in GAP, the GIMP Animation Package)
    • Bluebox (in GAP, the GIMP Animation Package)
  • File Handling
    • File formats supported include bmp, gif, jpeg, mng, pcx, pdf, png, ps, psd, svg, tiff, tga, xpm, and many others
    • Load, display, convert, save to many file formats
    • SVG path import/export

2. Krita

      One of the best freeware Photo-editing available is Krita. It includes most of the advance tools for photo editing. Features available in Krita are as follows,

  • Animation
    • Load and save animations in a convenient frame-as-layer format
    • MNG support
    • Frame Navigator
    • File formats supported include bmp, gif, jpeg, mng, pcx, pdf, png, ps, psd, svg, tiff, tga, xpm, and many others
    • Load, display, convert, save to many file formats
    • SVG path import/export

  • Mirroring tools
  • PSD Support
  • Multiple Selection tools
  • HDR Support
  • Transform Tools
  • Drawing Assitastants
  • OpenGL Enhanced
  • Brush Engines/Types
  • Training Resources
Surely update other advance freeware software available in photo-editing.