We use the following materials:

• Vectors and icons by Tetrisly (CC Attribution License).
• Vectors and icons by Brankic1979 (PD License).
• Vectors and icons by Nimble Design (MIT License).
• Vectors and icons by Orchid (MIT License).
• Vectors and icons by Bypeople (PD License).
• Vectors and icons by Shannon E. Thomas (CC Attribution License).
• Vectors and icons by Denis Rodchenko (CC Attribution License).
• Vectors and icons by Dazzle Ui (CC Attribution License).
• Vectors and icons by Theforgesmith (PD License).
• Vectors and icons by Solar Icons (CC Attribution License).
• Vectors and icons by Catalin Fertu (CC Attribution License).
• Vectors and icons by Mobirise (CC Attribution License).
• Vectors and icons by Siemens (MIT License).
• Vectors and icons by Jordan Hughes (CC Attribution License).
• Vectors and icons by Denali Design (MIT License).