Meetingbird for Gmail - View your calendar and schedule meetings right from Gmail
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Kin Calendar - The simple and connected calendar
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.
Calendly for Chrome - Schedule meetings without leaving your inbox
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.