UI Movement - The best UI design inspiration, daily
Marin Software - Optimize your Search, Social & Display ads across channels and devices. Marin Software, the leading cross-channel performance advertising platform.
UI Garage - Specific mobile and web design patterns for your inspiration
AdRoll - AdRoll is a leader in retargeting display advertising. Draw the right people with the right strategies.
UI8 - Carefully crafted UI design assets
Google Marketing Platform - Google's unified and improved marketing and analytics tools.