We present highlights of computational accelerator physics work at
Tech-X Corporation.  Our parallel particle-in-cell simulations of
beam-driven plasma acceleration are relevant to the E-157 experiment
at SLAC.  We are using the Python scripting language to prototype
tools relevant to the steering of high-performance codes written in
Fortran, C and C++, including an implementation of MPI in Python for
parallel applications.  We have a prototype cross-platform GUI for the
MAD-9 accelerator design code, which interactively generates beamline
survey and Twiss plots.  We are also using JAVA, CORBA, C++ and Python
to make a variety of data sets and Fortran applications web accessible
for fusion scientists.