LibRec (http://www.librec.net) is a Java library for recommender systems (Java version 1.7 or higher required). It implements a suit of state-of-the-art and up-to-date recommendation algorithms. It consists of three major components: Generic Interfaces, Data Structures and Recommendation Algorithms. To learn more, check out the helpful tutorial, detailed examples & comparison with other tools, and the source code.

• Cross-platform: as a Java software, LibRec can be easily deployed and executed in any platforms, including MS Windows, Linux and Mac OS.
• Fast execution: LibRec runs much faster than other libraries, and a detailed comparison over different algorithms on various datasets is available via here.
• Easy configuration: LibRec configs recommenders using a configuration file: librec.conf.
• Easy expansion: LibRec provides a set of well-designed recommendation interfaces by which new algorithms can be easily implemented.

• Baseline: GlobalAvg, UserAvg, ItemAvg, Random, Constant, MostPop
• Rating Prediction: UserKNN, ItemKNN, RegSVD, PMF, SVD++, BiasedMF, BPMF, SocialMF, TrustMF, SoRec, SoReg, RSTE, TrustSVD;
• Item Ranking: BPR, CLiMF, RankALS, RankSGD, WRMF, SLIM, GBPR, SBPR, FISM;
• Extension: NMF, SlopeOne, Hybrid, PD, AR, PRankD

The references for all the algorithms are summarized here

• librec-v1.2 is under development, see what's new
• librec-v1.1
• librec-v1.0

LibRec (c) 2015 is developped by Guibing Guo.

LibRec (c) 2014 was developped by Guibing Guo, under the supervision of Dr. Jie Zhang at Nanyang Technological University.

LibRec is only allowed for non-commercial usage.

LibRec is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. LibRec is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with LibRec. If not, see http://www.gnu.org/licenses/.