Doctopus - Doctopus gives teachers the ability to mass-copy, share, monitor student progress, and manage grading and feedback for student projects in Google Drive. Best used when paired with Goobric, a Chrome extension.
gClass Folders automatically creates and shares student folders for a teacher. This simplifies classroom workflow when using Google Apps.
Mapping Sheets provides an easy way to process data from Google sheets and plots it on a map.
Naavi Classroom Sync uses data from Google Sheets to create and update courses in Google Classroom and add new students.