Package for SMOTEBoost in R
There are two packages in R that should be able to use SMOTE to up sample the minority class: 


unbalanced package, and 
DMwR package 


It doesn't seem like they provide the boosting that is described in the paper that you might be referring to. But it should be straightforward to sew in SMOTE with the idea of boosting using some base tree packages in R like rpart (for example).