Hunter - Find all the email addresses related to a domain

qTox - A Qt graphical user interface for Tox.

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

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

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

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