For discussions related to modeling, machine learning, and deep learning.
Not an exhaustive list, but some related packages include caret, modelr, yardstick, rsample, parsnip, tensorflow, keras, cloudml, SparkML, h2o, and tfestimators.
caret
modelr
yardstick
rsample
parsnip
tensorflow
keras
cloudml
SparkML
h2o
tfestimators