Free 2d pie chart software for windows

Openchart2 provides a powerful and simple interface for Java programmers to create two-dimensional charts and plots Openchart2 provides a powerful and simple interface for Java programmers to create two-dimensional charts and plots.
Openchart2 is a full-featured 2D plotting solution for Java applications.
Openchart2 features an assortment of graph styles, including advanced scatter plots, bar graphs, and pie charts.
Openchart2 supports a variety of chart types, including:
- Bar Charts - including Stacked Bar Charts
- Pie Charts
- Radar Charts
- Scatter Plots - including Line Charts, Point Charts, or combinations
The Openchart2 rendering system allows multiple types of plots to be drawn on the same view, enabling unlike graphs to appear together.
Main features:
- Simple Data Passing
Openchart2 allows for a variety of techniques to be used for passing data into the plotting routines. Simple arrays or full database sources can provide data to the plotting routines.
- Dynamic Zooming
All chart types support dynamic zooming. Sample Swing chart panels are provided in the library with complete mouse-controlled dynamic zoom implemented for ease of use.
System requirements:
- Java 1.5 (5.0) or higher

Piechart Disk is a handy application that allows you to see where your disk space is going in an easy to read pie-chart. Piechart Disk is a handy application that allows you to see where your disk space is going in an easy to read pie-chart.
You select the top directory to scan, and Piechart Disk scans the directory then displays an interactive directory and file list with pie-chart.
Since Piechart Disk sorts the directories and files, the largest directories and files are at the top of the list.
Click the interactive file and directory list green plus and red minus icons to open and close directories, changing what is displayed in the pie-chart.
Right click a directory or file for that entrys detailed information.