Zeetaminds - Zeetaminds offers cloud based digital signage software with live social media integration. 

Mailtrack.io - The best email tracking solution I've found. Free

ScreenCloud - ScreenCloud is a simple, cloud-based Digital Signage software solution that makes it easy to display video, images and content on screens.

Saleshandy - Saleshandy is a cold email outreach platform that enables marketing and sales teams to scale their email outreach operations seamlessly.

Embed Signage - Multi-platform Digital Signage Software that's quick to learn and powerful to use. Packed with features, simple to use and wide range of device platform support. A better way to manage your Digital Signage.

Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.