Google announced yesterday that they have decided to offer the Nik Collection desktop suite for free starting March 24 as a "long-term investment" move in "building incredible photo editing tools." The powerful photo editing suite went for a bundled product at $149 at Google but is now free for everyone 24/7. Some years back, the Nik Collection would have cost photography enthusiasts a whopping $500. Google is even offering a full refund to those who have purchased the software this year.

Photography buffs, professional or amateur, may now make use of the powerful photo editing collection with its wide range of features in seven desktop plug-ins for Adobe Photoshop, Adobe Lightroom, and Apple Aperture: Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro, and Dfine. The suite includes black-and-white controls, vintage camera filters, noise reduction, HDR effects, color enhancement, color correction, and sharpening. Now anyone can have the capability to retouch, sharpen, and adjust the color as well as tonality of photos like a pro without spending a fortune on software.

Download the Google Nik Collection here.
Quick Follow Up
lola_ice: I have been using these filters since pre-Google days and find them indispensable.
All opf the images in my journal have been processed using one or more of the available modules.
I am color blind and do very little in the way of color shots. The Silver FX filters are the equivalent of and often exceed what might have been accomplished in a wet darkroom.
There are excellent tutorials available on YouTube at Nik Collection by Google
Also despite what the link says or other people might say in comments related to the filters they are usable as standalone modules without the need for Photoshop or Lightroom. Simply install and drag and drop images Will do batch mode) over the shortcut or exe to edit.