Develop a set of app icons for a productivity tool, using a minimalist approach with clean lines and subtle textures to convey a sense of professionalism and organization, with a focus on earthy tones and muted colors.

Create a series of app icons for a music streaming service, blending modern typography and abstract shapes to evoke a sense of coolness and sophistication, with a color palette that transitions from calming blues to vibrant oranges.

Design a set of app icons for a popular social media platform, incorporating a mix of bright colors and geometric shapes to create a visually appealing aesthetic that appeals to a younger demographic.