Hunter - Find all the email addresses related to a domain

Tox - Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

Snov.io - More leads. More sales. More revenue.

Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.

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

uTox - µTox is the lightweight client with minimal dependencies; it not only looks pretty, it runs...