Open Source JavaScript Report Generators

CuteReport is a report solution like Jasper Report, Crystal Reports or FastReport, but based on Qt framework. It can be easily used with any Qt application. In general, CuteReport consists of two parts: core library and template designer. Both are totally modular and theirs functionality can be easily extended by writing additional modules. It's totally abstract of used data and can use as storage: file system, database, version control systems, etc. The project's goal is to provide powerful, but yet simple to use for inexperienced user and report designers, reporting system. It is supposed to be a product that combines eXaro ideas from Qt world and FastReport functionality from Delphi world and brings the best of them to C++/Qt world and then shares it with Python, Ruby, Perl developers using bindings. СuteReport also has a commercial version. Read about it on the official web site.

MagicDBPrint is a cool database application that support auto form and report generation. It also supports printing format features which allows you to customize how you want your data to be printed by which printer. System skin are customizable.