Productivity suites & task management

Hosted workspace combining block-based documents, relational databases, wikis and project views, with an API and built-in AI features

Google's hosted productivity suite: Gmail, Drive, Docs, Sheets, Slides, Meet, Chat and Calendar with admin controls, Gemini features and developer APIs

Microsoft's subscription suite of Office desktop and web apps, Exchange email, OneDrive, SharePoint and Teams with Copilot and Graph APIs

Microsoft's chat, meetings and calling hub integrated with Microsoft 365, SharePoint and Entra ID, extensible through Microsoft Graph and Teams apps

Apple's built-in notes app for Mac, iPhone, iPad and iCloud.com with folders, tags, attachments, handwriting, shared notes and on-device search

Block-based document and notes app with native Apple, Windows and web clients, structured pages, collections and shareable published documents

Personal task manager for Mac, iPhone, iPad, Apple Watch and Apple Vision Pro from Cultured Code, sold as one-time purchases with free Things Cloud sync

Cross-platform task manager from Doist with natural-language scheduling, projects, labels, filters, shared projects and a public REST API

Open-source learning management system used by universities and schools for courses, assignments, quizzes, grading and forums, self-hosted or via MoodleCloud