Handlescout - Get notified when a Twitter username becomes available
Facebook for Business - Facebook Business gives the latest news, advertising tips, best practices and case studies to meet the business goals.
Namechk - See if your username is available on 100+ social networks
SocialPilot - SocialPilot is an app designed to help businesses and professionals with social media marketing.
Stacky.me - Easily manage all your bio links in one place.
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.