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ChartBrick's answer:
ChartBrick has a user-friendly UI that is both clean and simple, enabling users to effortlessly create straightforward charts in mere seconds or minutes.
Zeetings - Turn your presentations into interactive conversations
Notion2Charts - Notion2Charts is an easy to use online tool to generate beautiful embeddable charts from your Notion databases.
Mentimeter - a web-based polling tool for workshops, conferences & events
Notion Charts - Generate embeddable charts, beautifully optimized for Notion
SlideLizard - Powerpoint plug-in for live audience interaction
Data Jumbo - Build advanced charts for Notion in a minute.