What are best classroom Software/ website?

As per my experience, I am listing out software for smart classroom which might help to teacher to grow and enhance classroom. Moreover, I personally use these tools to enhance my knowledge  and manage things ...

• https://www.khanacademy.org
• https://www.lynda.com
• https://classroom.google.com
• https://www.onenote.com/classnotebook
• https://www.edusys.co/.../school-management
• https://www.edmodo.com/teacher...
• https://evernote.com
• https://getpocket.com
• https://www.teacherspayteachers.com/
• Google Chromebook
• ...

Please comment your school tool which help me and other teacher to grow and connect with edtech.