SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Addmefast - Building a website or network on Internet is no longer a hard task but promoting and marketing it is still a difficult task but not impossible.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
YouLikeHits - YouLikeHits is an online service that brings results within seconds.
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.
LikesPlanet - Get Facebook likes, Twitter Followers, YouTube Subscribers, Comments, and Shares.