Gradelink - Gradelink is a one-stop-shop system for K-12 schools. You can see grades, attendance, tuition, admissions and communication in one place.

Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

Infinite Campus - Access your (or your child's) schedule, grades, assignments and attendance data using the...

mlist - Email newsletters, outside of the inbox

Administrator's Plus - Cloud based student information management software

TL;DR Email - Send short emails & read emails as fast as you read Facebook