DxO has acquired the Nik Collection of software from Google and will continue, at least temporarily, to make it available for free. The download link can be found at https://nikcollection.dxo.com/. The Nik tools have been developed as plug-ins so do some research to make sure you have a processing program (e.g., LR, PS, etc.) which is compatible with Nik before you download.
I mentioned in an earlier post that Topaz Studio is also offering free software. It’s not the full suite of products but it may be worth your while to download the free version and check it out. http://web.topazlabs.com/2017/05/free-topaz-studio/.