rawtherapee is free... and Corel still exists - AfterShotPro... both do Win, OSX, Linux... SilkyPix runs on OSX
PS: there is free Phocus from Hasselblad that uses OSX embedded raw conversion
I have used Alien Skin Exposure 4 and SilkyPix Pro 9 - Exposure offers an all-in-one editing environment. SilkyPix is quirky and, while it provides terrific conversion for my Fuijfilm X-H1 raw files, it is slow and creates massive color changes when the raw files are underexposed by more than two stops. Now, with CaptureOne including fujifilm film sims, SilkyPix is not necessary in my experience except in very specific circumstances.
The various all-in-one apps like Luminar, OnOne and Topaz Studio offer a varied and wide-ranging set of tools but generally do not produce as high-quality output as a quality dedicated raw converter. The workflow and editing experience ranges from okay to terrible, in my opinion, and transitioning from one module (OnOne, for example) to another can be painfully awkward and slow. The emphasis of these applications appears to be "do everything," including the quest to generate the de facto DAM alternative to Lightroom, instead of mastering the essentials. They all have trials, but trying everything can be exhausting!
I used to use DxO extensively but stopped when I switched from Canon equipment to Fujifilm, as DxO does not support X-Trans sensors. I beta tested PhotoLab v1 as they introduced local adjustments with the Nik U-Point technology, and it is impressive when it works. I think they are getting the UI under control and are making using the U-Point and other local adjustments easier and more efficient.
Kirk