Livestorm for webinars with active audience participation.
File storage:
Dropbox for really easy online storage and file syncing.
Drive if you prefer staying in GSuite.
OneDrive offers 1TB of storage with an Office 365 subscription from $6.99/month and comes with the full Office suite and 60 minutes of international calls on Skype.
Project Management Tools:
Basecamp is one of the most popular and most highly recommended project management tools.
Asana (the one we use) is really easy to manage and is built for teams.
Trello has a colorful interface that lets you drag list items around on a virtual Kanban board.
Taking notes, making lists, working collaboratively: