Robinhood - Free stock trading service.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Stonksfolio - Gain insight into the performance of stock & ETF investments
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Bux - Casual stock trading - thumb swipes only
SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.