Mermaid, the open source diagramming and charting tool, has long been popular with developers for its ability to create diagrams using a Markdown-like language.

Google Sheets Gemini upgrade The update means Gemini can now provide contextual trends, patterns, and correlations between different variables in your data, all of which can be turned into charts.

ClickCharts is a free flowchart, process flow, charting and diagram maker software for Windows PC. Download it free for home use.