Callpage - Turn website visitors into sales calls. Use CallPage and provide immediate free phone callback to your leads in 28 seconds.
Novocall - Novocall converts web visitors into sales calls in seconds.
LimeCall - The smartest way to generate and convert inbound leads instantly into qualified sales meetings and sales calls with Click-to-Call, Call Tracking, Voice Automation, and Call Scheduling.
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
Upcall - Upcall enables you to crowdsource your outbound calls. Collaborate with 1000+ on-demand callers worldwide for sales, marketing and customer support calls. Free trial.
Cavako - Convert more site visitors into leads and sales