LinkedIn Sales Navigator for Gmail - Rich contact profiles inside Gmail

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.

ConfigCat - ConfigCat is a developer-centric feature flag service with unlimited team size, awesome support, and a reasonable price tag.

Magic Popup by Frontender - Convert visitors Into email list subscribers

Amplemarket - AI-powered sales assistant

Little Widgets - HTML, CSS Framework with beautifully designed website widgets, popups, and forms.