Hunter - Find all the email addresses related to a domain

CoinArbitrage - Crypto Currency Price Monitor in Real time with Alerts and Notification through email, sms, Desktop Notifications Instantly and watch all of your assets and coins in one place with 16 Exchanges, 6500+ Coin (bitcoin, etherum, dogecoin,litecoin,ripple)

Apollo.io - Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.

BitInfoCharts - Price, reward, difficulty, hashrate, market capitalization, block time, blocks count for all the...

Icypeas - This email finder has the capacity to bypass catch-alls

Stampery - Stampery generates legally binding proofs of existence, integrity and ownership.