Video Software - Making a video of a lesson Screencasting You can also record a lesson with a cellphone and post videos in a google Drive https://filmora.wondershare.com/screen-recorder/best-screen-recorder-for-mac.html free video editing software for PC and mac
Video Conferencing Software - SkypeTeamsZoomGoogle Hangouts Meet. Meet is the new video conferencing application. The apps are specifically called meet. https://apps.apple.com/.../hangouts-meet-by.../id1013231476 will get you there on iOS and https://play.google.com/store/apps/details
Tes Lesson Development - Create digital lessons in less than 5 minutes
Teaching with Zoom - Help guides that will teach you the mechanics of using Zoom for video conferencing, web conferencing, and webinars
MobiMax - MobyMax helps struggling learners quickly catch up to grade level and closes learning gaps for all students.
Math App - Free Math allows collecting digital assignments from students and enables quick grading by grouping similar student work on each question. It isn't limited to a specific bank of questions and all of the work done by students is completely freeform, so it can work for a broad range of classes.
Edpuzzle - Easily create beautiful interactive video lessons for your students.
EdModo - Tools for distance learning
Digital Manipulatives - The most popular manipulatives at your fingertips. Powerful yet easy-to-use.
Brian Buffington's List of Free Tools - Online Cheat Sheet of Tools from Brian Buffington