NAMD supports offloading calculations to Intel Xeon Phi coprocessors. This feature is new and should be considered experimental. Observed speedups are around a factor of two, but parallel scaling is degraded.
The Xeon Phi coprocessor is supported in NAMD similar to CUDA GPUs. Binaries are not provided, so you will need to build from source code (see "Compiling NAMD" below) specifying -with-mic to the config script. As with CUDA, multicore or ibverbs-smp builds are strongly recommended. A recent Intel compiler is obviously required to compile for Xeon Phi.