Google Nik Collection now FREE | Windows + Mac

You will need Adobe Photoshop to use these.

System Requirements & Compatibility

Windows:

• Vista, 7, 8 (I would certainly try it on 10. If Photoshop works, these should, too).
  
• Adobe Photoshop: CS4 through CC 2015
  
• Adobe Photoshop Elements: 9 through 13 (apart from HDR Efex Pro 2, which is not compatible with Photoshop Elements)
  
• Adobe Lightroom: 3 through 6/CC
  

Mac:

• OS X 10.7 through 10.10
  
• Adobe Photoshop: CS4 (CS5 for HDR Efex Pro 2) through CC 2015
  
• Adobe Photoshop Elements: 9 through 13 (apart from HDR Efex Pro 2, which is not compatible with Photoshop Elements)
  
• Adobe Lightroom: 3 through 6/CC
  
• Apple Aperture: 3.1 or later
  

If you have recently (2016) bought it (and it came with a $150 price tag), you will get a refund (more information here). If you have never used these, you are missing out. If you're like me and have an older version, this is the time to upgrade! As per the latest news, these will be free indefinitely.

Get your free copy here (430 MB):
www.google.com/nikcollection

Simply run the installer, choose the correct option (close Photoshop first). That's it.

If you don't know what these are, they are filter add-ons for Photoshop, that offer some really superior image correction and enhancement features, whether it's for digital works, or photography. 32-bit and 64-bit available.

Enjoy!