Getting illustrations to compliment your design work or to use within your project can be hard. In order to save you some valuable time, I have put together a list of websites that offer free Illustrations that you can use for all your needs.
Trendy mix-&-match illustrations of people with a design library for InVIsion Studio and Sketch
Ouch helps creators and designers who don't draw overcome the lack of quality graphics. You can download free illustrations from top Dribbble artists to class up your product.
Open-source illustrations for any idea you can imagine and create. Comes in super handy when you are designing a website or an app.
Hand-drawn illustration library to create scenes of people. You can use them in a product, marketing, comics, product states, user flows, personas, storyboarding, invitations, or whatever you want!
Each week, manypixels offers royalty-free illustrations that you can use to power up your projects. You can use them in a commercial or non-commercial way for your landing pages, blog posts, email newsletters, social media graphics and more!
IRA Designs allows you to build your own amazing illustrations, using their gradients and hand-drawn sketch components. (MIT License)