Get the Nik Photoshop plugins for Free from Google

Download the Photoshop and Lightroom plugins Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro and Dfine for free. Google has released the Nik Collection of Lightroom and Photoshop plugins for free.
Previously, the collection of six separate plugins for Photoshop and Lightroom would cost $149 (£99). If you bought them this year, you'll get your money back.
Google bought the developer of the plugins Nik Software in September 2012, essentially to get access to its filter technology to add it to its consumer photo tools (then Picasa, now Google Photos). In March 2013, Google dropped the price from charging you US$100 (around £66) per app, or $499 (£330) for the full bundle to $149 (£99).
Analog Efex Pro replicates the loks of traditional filters, lenses and cameras. Color Efex Pro has colour correction and retouching tools. Silver Efex Pro (below) includes sophisticated black-and-white filters.

Viveza allows selective colour adjustments. HDR Efex Pro fakes the look of HDR photography. Sharpener Pro offers sharpening tools and Dfine is for noise reduction.
The Nik plugins for Photoshop and Lightroom work on both Mac OS X (version 10.7.5 to 10.10) and Windows (Vista, 7 or 8 - though it also appears to run fine on my Windows 10 workstation). They require Photoshop CS4 or later or Lightroom 3 or later - including the latest CC 2015 versions of both Photoshop and Lightroom.