ReportServer is a modern and versatile open source business intelligence (BI) platform with powerful reporting features.
With ReportServer you are not limited to one provider's solutions. ReportServer integrates Jasper, Birt, Mondrian and Excel-based reporting: choose what best suits your needs!
The source code is also available in GitHub: https://github.com/infofabrik/reportserver
ReportServer scripting samples: https://github.com/infofabrik/reportserver-samples