R Package For Calling Matlab Through System (matlabr)
R package to call matlab directly using system command. This is a simple package that tries to get around using R.matlab.

Read and Write MAT Files and Call MATLAB from Within R (R.matlab)
Methods readMat() and writeMat() for reading and writing MAT files. For user with MATLAB v6 or newer installed (either locally or on a remote host), the package also provides methods for controlling MATLAB (trademark) via R and sending and retrieving data between R and MATLAB.

RMatlab Package (RMatlab)
This is the early release of a bi-directional interface between the R and Matlab languages. fe The idea is that Matlab users can call R functions as if they are regular Matlab functions without learning the R language, and similarly R users can access Matlab functionality from with the familiar R environment and syntax.