Color and Corrections

 Brightness and Contrast
 Gamma Correction
 Hue, Midtone, Shadow
 Color and Tinting
 Grayscale and Invert
 Color Depth (including web-safe palette)
 Histogram adjustments
 Channel Split and Combine
 Edge Detect and Edge Enhance
 Sharpen, Soften and Blur
 Automatic Noise Removal
 Averaging to remove moires
 HSV, HSL, CYMK and RGB channels

Image Manipulation

 Convert between 50+ image file formats
 Resize and Resample
 Flip, Mirror, Rotate
 Shear images to correct scans
 Automatic Edge Trim
 Add and remove borders 
 Add photographic frames and borders
 Image Arithmetic
 Cropping
 Various special effects

Web Features

 Convert to JPEG or PNG with quality preview
 Resize and Resample
 Color depth adjustment with web-safe palette
 Add/remove borders and add masks