NDNoise is a Java-based freeware that enables to remove noise in digital images.
Features in version V0.4:
load / save multiple image with the same filter tuning
multiple image format support : PNG, JPEG, GIF,... (prefer lossless PNG compression !)
3 sliders tuning for basic use : noise removal, dots/spots/lines smoothing, retexturing
direct visualisation of filtering effect by alternate visualisation
differential view for filtering control
zoom in/out at any level