Apps similar to Power-user include empower® Suite. It's paid, but Power Up Kit is free. Other options are ChartEngine for Excel, think-cell chart, Ampler and UpSlide. You can choose from more than 10 Presentation Makers like Power-user for Windows and Mac.
Grunt is the ultimate add-in for anyone working with presentations or reports in PowerPoint. Create charts and other visualizations in no time. Connect to data in Excel. Adapt our wide range of dynamic templates to your needs.
Aploris offers a chart editor for PowerPoint for easy design of business graphs with advanced features. All typical chart types are supported as well as advanced type like Marimekko, waterfall and Gantt chart.
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