Xmind - Xmind is a brainstorming and mind mapping application.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Creativity 365 - Cross-device content creation suite
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.