This software is truly excellent…it is a full suite you can read about here: https://www.google.com/intl/en-GB/nikcollection/
If you need help, it’s here: https://support.google.com/nikcollection/?hl=en-GB#topic=2991541
You will need Ps to use it.
“Today we’re making the Nik Collection available to everyone, for free.
Photo enthusiasts all over the world use the Nik Collection to get the best out of their images every day. As we continue to focus our long-term investments in building incredible photo editing tools for mobile, including Google Photos and Snapseed, we’ve decided to make the Nik Collection desktop suite available for free, so that now anyone can use it.
The Nik Collection is comprised of seven desktop plug-ins that provide a powerful range of photo editing capabilities -- from filter applications that improve color correction, to retouching and creative effects, to image sharpening that brings out all the hidden details, to the ability to make adjustments to the color and tonality of images.
Starting March 24, 2016, the latest Nik Collection will be freely available to download: Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro and Dfine. If you purchased the Nik Collection in 2016, you will receive a full refund, which we’ll automatically issue back to you in the coming days.
We’re excited to bring the powerful photo editing tools once only used by professionals to even more people now.” – Google
What is the recommended workflow when using the Nik Collection?
The recommended workflow for the Nik Collection is as follows:
1. If desired, apply Raw Presharpener using Sharpener Pro 3.
2. Apply noise reduction using Dfine 2.
3. Control color and light using Viveza 2.
4. Apply filter enhancements using Color Efex Pro 4.
5. Convert to black and white using Silver Efex Pro 2.
6. Apply output sharpening using Sharpener Pro 3.
Note: Analog Efex Pro 2 can be utilized at any point after Dfine 2. HDR Efex Pro 2 is best used immediately after Dfine 2.
If you would like to learn more about the products and how to use them, there are online learning resources available. Please click to view our training videos."
Windows: Vista, 7, 8
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
You KNOW I’m downloading it as I’m typing this.