IRSA is a toolkit for Information Retrieval Service Assessment.
...It builds upon the Grails Web Framework and is developed at GESIS.
It implements two main functionalities: (1) A number of showcases that show the implemented services like a so-called Search Term Recommender and different science-model based ranking mechanisms and (2) an IR assessment module that let's one do an interactive evaluation of the retrieval services.
All implemented services are available via well-documented RESTful API. This toolkit is distributed under an Apache License 2.0.
The Duine Framework allows one to develop prediction engines for recommender systems. It contains a set of prediction techniques, a way to combine these techniques and a profile manager. The framework has a plug-in architecture, allowing customization.