RAWexchange started in September 2014, when there was an increasing demand for RAW files for practice purposes. This question is very positive, because you learn a lot about photography and lighting in retouching. So it makes sense to start with good files and take everything you learn "back" into photography.
Courses and packages by Stefan Kohler
Inferno! Tutorials and assets for fire effects in Photoshop & Co
Fire and flames for your pictures
Winter photography: presets, overlays, actions for winter photos
Over 700 assets for cool pictures
Baby and children's photography: 750 assets for photos
Digital camera bag!
Brushes for Photoshop & GIMP: water images, droplets
For lively images & designs
Falling fall leaves pictures - Autumn leaves
Create an atmospheric fall mood
Water textures - drop images
Water splashes in abundance
Sparkles, bokehs, sparkle images - Photoshop lighting effects
For particularly hot compositing
Red roses pictures - Texture - Rose petals
Rosy prospects for your image compositions
Textures: Dust cloud - images
Shimmering dust for your compositing!
Images for your composings: old sheet music, falling leaves
Yellowed pages for your compositing
Images with motifs of feathers against a black background
White feathers & peacock feathers
Images Fire, flames, sparks - textures for Photoshop & Co
Soft glow & fiery explosions
Blood Textures for Photoshop & Co
For dark art, Halloween & horror scenes
Water images: Ink in water - formations for composings
Floating formations
Over 500 milk images for sparkling photo effects
Hundreds of milk splashes
Soap bubble images: Overlays for your photos and composings
A colorful play of colors
Snow textures - Snowflake images for Photoshop & Co
Realistic winter magic