LensKit

@article{Ekstrand2011LensKit,
  title={LensKit},
  author={Michael D. Ekstrand and Michael Ludwig and John Kolb and John Riedl},
  journal={Proceedings of the fifth ACM conference on Recommender systems - RecSys '11},
  year={2011}
}
1 Citations
Recommendation and Classification Systems: A Systematic Mapping Study
TLDR
The article suggests the development of new ML research lines to facilitate its application in the different domains and shows that the work being done in the ML (for classification and recommendation) research and industrial environment is far from earlier stages such as business requirements and analysis.