设计资源网站

一、Where to Find Free-For-Commercial-Use Icons

These are some of my favourite resources for free (with attribution) icons:

http://www.flaticon.com/

https://material.io/icons/

http://fontawesome.io/

二、Where to Find Free-For-Commercial-Use Image Assets

For HD photographic Images, these are my favourite websites:

http://www.resplashed.com/

https://pixabay.com/

For vector images:

https://www.vecteezy.com/

http://www.freepik.com/

三、Tools and Resources for Creating Prototypes

Marvel App

https://marvelapp.com/

InVision App

https://www.invisionapp.com/

Mac Keynote App

http://www.apple.com/uk/keynote/

Principle

http://principleformac.com/

Proto.io

https://proto.io/

四、Tools and Resources for Creating Mockups

Websites and Tools for Creating Real Life App Mockups

https://placeit.net/

http://magicmockups.com/

http://smartmockups.com/

Websites and Tools for Creating Designed Mockups (Alternatives to Sketch)

https://moqups.com/

https://www.invisionapp.com/

https://www.uxpin.com/