Although MS Excel & Powerpoint seems a little bit out of the scope for web designers/developers, many web applications are built with reporting options that can be exported, so, they can be easily used as templates.

Juice Analytics is sharing 15+ free Excel & Powerpoint charts that can beautify any report.

There are simple-to-advanced examples of various chart  types like bar, line or pie charts which comes with sample data that makes customizing faster by editing the values used.

Google Analytics offers various ways to view the data & make comparisons, which is great. But if you need a totally unique view or want to make comparisons with another data source, you’re limited.

Excellent Analytics is an Excel plug-in for importing web analytics data from Google Analytics in to an Excel spreadsheet.

So, you can easily build queries with all dimensions and metrics available or apply filters to create advanced queries

The plug-in is open source & for improving it further, it can be found here.