SERPStream is a 100% free SEO tool. Members can keep track of their site's Search Engine Results Page position with updates as frequent as a dozen times a day. SERPStream have a great newsletter, sends email alerts, and have a state of the art keyword rank tracking dashboard.
Tap2Trade - Tap2Trade is a cloud-based sourcing and procurement tool that helps in maximizing the spend visibility and savings, while it helps to spend management.
Serpstat - Search analytics, Rank tracking, Backlink analysis and Site Audit tool.
ServiceTree - ServiceTree is a platform that enables users to scale their business and improve their bottom line by fulfilling the expectation of customers.
SEO PowerSuite - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!
QARA Test - QARA Test is a platform that enables users to reduce their testing efforts and accelerate their testing capability.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.