Downloading JasperAssistant 3.1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac application is an intellectual property of Peter Severin. The application is included in Developer Tools.
From the developer:
JasperAssistant is a visual report designer for JasperReports, a popular open-source reporting engine. It is built on top of the Eclipse's plug-in architecture and its main goal is to help you create JasperReports report definition files through an intuitive graphical interface.
You may want to check out more Mac applications, such as FMMenulet, eclipse-php or Prototypes, which might be similar to JasperAssistant.