Interfacer - Collection of more than 200+ free design resources
Attention Insight - Maximize advertising campaign results and design performance with pre-launch analytics.
Facebook Design Resources - A collection of free resources made by designers at Facebook
Eyequant - We’ve built an artificial intelligence that instantly predicts how users will see your website so that you can create landing pages that sell
Freebiesbug - Collection of the best free web design resources.
VisualEyes.design - Instant visual analysis of websites to perform competitor analysis or conversion rate optimization.