Interfacer - Collection of more than 200+ free design resources
SocialPilot - SocialPilot is an app designed to help businesses and professionals with social media marketing.
Facebook Design Resources - A collection of free resources made by designers at Facebook
Fomo - Fomo turns your site into the online equivalent of a busy store
Freebiesbug - Collection of the best free web design resources.
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.