I can't live without these:
Kit (email/newsletter)
WordPress (my whole business is on the WordPress ecosystem)
Canva (graphics, some docs, presentations, etc.)
CoSchedule (project planner)
Tweek (daily-to-do list)
Notion (long-term planning, info products)
Skool (community)
Obsidian (journaling)
Zoom (meetings)
Calendly (booking)
Google Workspace (Docs, Forms, Sheets, Email)