This is the repository with the Recommender extension source code developed on the Rudjer Boskovic Institute as part of e-LICO FP7 project (http://www.e-lico.eu/recommender-extension.html). Recommender extension is a RapidMiner extension that integrates various recommendation operators into RapidMiner. Extension is based on the MyMediaLite Recommender System Library. Project associates: Matej Mihelcic, <matmih1@gmail.com> Nino Antulov-Fantulin, <nino.antulov@irb.hr> Matko Bosnjak, <matko.bosnjak@gmail.com> Project Leader: Tomislav Smuc, <smuc@irb.hr> Cite work as: Mihelcic, M., Antulov-Fantulin, N., Bosnjak, M., Smuc, T., Extending RapidMiner with recommender systems algorithms, RapidMiner Community Meeting and Conference 2012, Budapest, Hungary