Keyword Discovery - Keyword Discovery is a keyword research and analysis tool.
Keyword Hero - Keyword Hero is an SEO tool for organic keywords.
SheerSEO - SheerSEO helps you to track Google Search Engine Rankings for critical keywords. PageRank, Back Links and more.
Keyword Country - Keyword Country is an AI-powered keyword research tool.
AsinSeed - Asinseed is a professional tool specifically dedicated to Amazon keyword optimization.
GrepWords - Grepwords is an API-first Google Keyword Suggestion Tool.