I’ve just released LazyQuery. It currently provides an intuitive dplyr-like interface to Query. Being built on LazyContext, there are exciting possibilities for specialized/optimized code interpretation for various data-structures using run-time information. This means that in the future, LazyContext could be a front-end to a variety of query-like interfaces (DataFramesMeta for dataframes, etc.).
LazyQuery 0.1.2 is out which now has two backends, one for Query, and a homegrown one for DataFrames. Should be getting close to a drop-in replacement for dplyr (minus the database capabilities).