Most camera manufactures have a simple editing software that either comes with the camera or is available as a download for free. Gimp was mentioned above, but I have no knowledge of how it works
I'm always slightly amused on the pay side they're always referred to as Adobe or Photoshop "clones". Sometimes you get what you pay for. Adobe subscription plan @ $10/month is affordable for most people and does all. Lightroom is available as a purchase for just over $100, Adobe elements is around $70, and Affinity and Corell Paintshop are about $50. No experience with Affinity but I've used Paintshop, and there are a lot of similarities to Photoshop. I might have kept using it if they'd fixed the bug that kept causing it to crash.