It may take you quite a while to familiarize yourself with the program as it is easy to get lost in all those panels and instruments. Raw Therapee supports much of the widely used cameras and filetypes. Yet it is – for all popular operating systems such as Mac OS X, Windows, and Linux. One of the most popular editing software which seems to be just too good to be free. Extra features include easy object removal, background replacement, makeup tools, and a library of artistic filters. Professional photographers will most likely find Movavi Picverse equally useful, as it massively facilitates image editing.
This is probably the best free RAW photo editor for beginners, as it is very easy to navigate and offers the most popular instruments for color correction and retouching. The latter one doesn’t allow saving RAW images, but you can still open the file in the program and explore its potential. Although the full package is not free, most tools are available in the trial version. Widely known for its huge range of functions paired with a user-friendly interface, Movavi Picverse allows processing RAW images, too.