Q-Stats - Get free marketing insights for every question on Quora.

SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

Site Rank Data - View historical rank information of websites via time series charts.

Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.

HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.

HubSpot Marketing Hub - HubSpot is a cloud-based inbound marketing software that allows businesses to transform the way that they market online.