What are some alternatives?
When comparing Marketing Inspo and Atlassian Design, you can also consider the following products
Illustration Tools - Directory of tools and resources for illustrators
Design Principles - An open source repository of design principles and methods
SaaSFrame - Browse hundreds of SaaS marketing pages, product interfaces and email flows.
Product Disrupt - A design student's list of resources to learn Product Design
Blush - Illustrations for everyone
UpLabs - The best material design, iOS & web resources, every day