WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Business Hangouts for G Suite - Business Hangouts is a webinar platform its an all-in-one app to produce business and corporate Webinars, Online meetings, Web Conferences, and Virtual Events.
NEWOLDSTAMP - Email signature generator
Supermetrics - Supermetrics condenses all the major vectors of data relevant to a user's marketing campaigns and helps them make sense of it all.
Sigstr - Email signature marketing
Cervinodata - Cervinodata Makes it super easy to present your campaign performance data in Klipfolio, Google Data Studio and others. Free plan available.