LaTeX can be used to produce a variety of different charts and diagrams, including: flowcharts, gantt charts, pie charts, branching and decision trees, family trees, histograms, bar charts and more. If you're looking for a particular type of chart that isn't featured here, please let us know, or submit your own example to the gallery.
These examples show how to make Gantt charts for project planning in LaTeX with the pgfgantt package. They are from the package documentation. The pgfgantt package provides many useful macros for generating the calendar for the Gantt chart for either absolute or relative dates. It also provides macros for grouping and linking tasks, and for full control over the styling of the chart.