OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.

UsersInsights - The Users Insights WordPress user plugin helps you manage your user data in one intuitive, beautiful and searchable place.

Sleeknote - Set up lead capture forms on your website in minutes. No coding required. Sync your new email leads with your favorite email service provider. Try for free.

Affinio - Affinio is an advanced marketing intelligence platform that leverages the interest graph to understand today’s consumers.

Poptin - Create engaging and high converting website pop ups and contact forms in minutes. With Poptin, you get access to a feature-packed conversion rate optimization toolkit that converts more website visitors into email subscribers, leads, and customers.

Quantcast Measure - Quantcast Measure provides free cross-platform audience measurement for a mobile app, website, network or platform.