Notion Charts - Generate embeddable charts, beautifully optimized for Notion
Geckoboard - Get to know Geckoboard: Instant access to your most important metrics displayed on a real-time dashboard.
Vizydrop - Explore data from apps and sources you are using in a visual way. It takes no effort.
Google Data Studio - Data Studio turns your data into informative reports and dashboards that are easy to read, easy to share, and fully custom. Sign up for free.
NoMunchies - Compose PlantUML diagrams to Notion.App to write PlantUML code and upload the resulting diagram to Notion.
datapine - datapine offers a lean Business Intelligence software that helps non-technical users to explore, visualize and share their data like never before.