Update README.md

README.md

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-# Photoshop
-- [GIMP](https://www.gimp.org/) *(Windows, Mac, Linux)*
-- Affinity Photo
+# Adobe Alternatives
+
+Legend:
+- ✨ = Free & open source
+- ⭐️ = Free of charge
+- 💵 = Single purchase
+- 🔒 = Subscription for more functions
+
+## Photoshop
+
+### Photography
+- ✨ [GIMP](https://www.gimp.org/) *(Windows, Mac, Linux)*
+- ⭐️ Sumo Paint *(Windows, Mac, Linux)*
+- 💵 [Affinity Photo](https://affinity.serif.com/en-gb/photo/) *(Windows, Mac, iOS)*
+- 💵 Photoline *(Windows, Mac)*
+- ⭐️ Photopea *(Windows, Mac, Linux)*
+- ⭐️ Paint.NET *(Windows)*
+- 💵 Pixelmator Pro *(Mac)*
+- ⭐️ PaintShop Pro *(Windows)*
+- ⭐️ Pxlr *(Windows, Mac, Linux)*
+
+### Painting
+- ✨ Krita *(Windows, Mac, Linux, Android)*
+- 💵 Clip Studio Paint *(Windows, Mac, iOS, Android)*
+- 💵 Paint Tool SAI *(Windows, Mac)*
+- 💵 Procreate *(iOS)*
+- 💵 Artstudio Pro *(iOS)*
+- ⭐️ IbisPaint *(Android)*
+- ⭐️ AD Sketchbook *(iOS, Android)*
+- ✨ Firealpaca *(Windows, Mac)*
+- ⭐️ Medibang *(Windows, Mac, Android)*
+- 💵 Paintstorm *(Windows, Mac, iOS)*
+- ✨ MyPaint *(Windows, Mac, Linux)*
+- 💵 CorelPainter *(Windows, Mac)*