Jasperwave - the other JasperReports Designer
It's always good when there is new competition on the field: Jasperwave is a recent project on creating a very user-friendly JasperReport Designer. Currently it is at version 0.9.2 and available both as Eclipse plug-in as well as standalone client from here.
I have to say that for such an early version it is already a very impressive offering. All the basic functionality is covered, sub-reports are partially implemented and support for tables and crosstabs is coming with the next release.
Overall, this report designer shows huge potential and I am looking forward to the next release! In the meantime, check out the current version here.