https://www.threetowners.net/forum/

A few years ago, this excellent suite would have cost several hundred of ££. NOW IT'S FREE and can't beat that !

https://www.google.com/nikcollection/

Analog Efex Pro: Applies film-era camera, lens, and film simulation to digital images (i.e. digital images made to appear as 35mm film images)
Color Efex Pro: Package of filters that comes with many effects e.g. HDR effect
Dfine: Noise reduction
HDR Efex Pro: Specialised program for processing HDR pictures
Sharpener Pro: Image sharpening
Silver Efex Pro: Black & White conversion
Viveza: Colour with advanced functions to change contrast and saturation

That looks to be a great free photo editing programme, Jim McCreadie.

It certainly is mate. Nik were around for a few years before being purchased by Google.

Get the software while you can. Rumour is that Google will no longer develop and stop supporting the tools in the near future.