Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs

SalesOptimize - Selling to online retailers? Revolutionary sales lead generation search engine driven by deep web analytics

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

hubsell - Sales automation for modern sales teams

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

Elucify - A completely free software tool that uses crowdsourced data to find business email addresses