If you are a user of Photoshop, Photoshop Elements, Lightroom, or Aperture you owe it to yourself to download these plug-in tools from Google.  These are true high end enhancements for all these products and now, Google has made them free.

the Nik collection It includes Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro, and Dfine.  Each of these are fine additions to the adobe products but together and for free they add a major enhancement to the ability of these products, particularly for Lightroom users.

• Analog Efex Pro – Explore the look and feel of classic cameras, films, and lenses.
• Color Efex Pro – A comprehensive set of filters for color correction, retouching, and creative effects.
• Silver Efex Pro – Master the art of black-and-white photography with darkroom-inspired controls.
• Viveca – Selectively adjust the color and tonality of your images without complicated masks or selections.
• HDR Efex Pro – From natural to artistic, explore the full potential of HDR photography.
• Sharpener Pro – Bring out hidden details consistently with the professional’s choice for image sharpening.
• Dfine – Improve your images with noise reduction tailored to your camera.

Start by looking at Define and Sharpener Pro.  These are the best noise reduction and sharpening tools I have ever used.