Trees, Bagging, Boosting. Random Forests and Gradient Boosting machines.
Slides here.
Trevor Hastie, Robert Tibshirani, Jerome Friedman: The Elements of Statistical Learning (2nd Edition), Ch. 9.2 (pp. 305-310), Ch. 8.7 (pp. 282-288), Ch. 15 (pp. 587-602), Ch. 10.1 (pp. 337-341)
Rich Caruana, Alexandru Niculescu-Mizil: An Empirical Comparison of Supervised Learning Algorithms