Here’s a checklist of the best free photo editing applications for complete beginner photographers on a PC and Mac:

For PC:

1. GIMP – A popular open-source photo editing software that provides powerful features like layers, masks, and filters.
2. Paint.NET – A user-friendly photo editing software that is great for beginners. It has an intuitive interface and supports layers, filters, and plugins.
3. Fotor – An all-in-one photo editing software that provides basic editing tools, filters, and templates to create collages, social media posts, and more.
4. PhotoScape – A simple photo editing software that includes basic editing tools, filters, and a batch editor to edit multiple photos at once.
5. RawTherapee – A powerful photo editing software that supports RAW files and provides advanced editing tools like curves, tone mapping, and color correction.

For Mac:

1. Apple Photos – A default photo editing software for Mac that provides basic editing tools like crop, rotate, and adjust. It also supports filters, effects, and retouching tools.
2. GIMP – A popular open-source photo editing software that provides powerful features like layers, masks, and filters.
3. Pixlr – A user-friendly photo editing software that provides basic editing tools, filters, and templates to create collages, social media posts, and more.
4. Darktable – A powerful photo editing software that supports RAW files and provides advanced editing tools like curves, tone mapping, and color correction.
5. Fotor – An all-in-one photo editing software that provides basic editing tools, filters, and templates to create collages, social media posts, and more.

Remember, these are just a few of the many free photo editing applications available for PC and Mac. It’s always a good idea to try out different applications and find the one that suits your needs and preferences best.