Design is more than just pretty pixels (no offense to pretty pixels). It's about user experience, a deep understanding of product, and mastery of tools like Adobe Photoshop and Microsoft Paint.

These design resources will help:

📥 Lingo: Organize, share, and use all your visual assets in one place
📱 SmartMockups: Create stunning product screenshots in seconds
🖌 Pattern: A gorgeous, focused, drawing application for the iPad
💎 Angle: Get 200+ iOS & Android vector device mockups for Sketch
😎 Design Inc: Find high quality design work done, on-demand
👶 KiddoPaint: Like Microsoft Paint in your browser (have fun)

For more, follow the Design Tools topic on Product Hunt.