Moodle and BigBlueButton ARE FREE and OPENSOURCE software that provides my classes with a paperless, very effective lesson delivery, coursework, live online tutoring, and assessment tool all in one web location with a single Google sign-on.  My Moodle site is at http://DanvilleScience.org

My school is a one(device)-to-one(child) school.  Moodle allows for centralized online coursework, manual essay grading all of one question each.  So, pulling up short essay answers for a class where all of question 1 can be answered by the teacher, then all question 2 and so directly on the Moodle site is a powerful time saver for teachers.  Teacher responses can also be entered or the correct answers can easily be posted in the teacher response section. 

Moodle is utiliized for ALL hybrid learning with built-in Bell-ringer and Exit Tickets, gamification, self-grading assignments and a very powerful web conferencing capability from BigBlueButton.  I use BigBlueButton web conferencing primarily for reviewing forr tests and Project/Field Trip planning.

Here is a video that I made describing some of Moodle's powerful features.