iraf - 2.18.1~rc1-2 main

IRAF is the "Image Reduction and Analysis Facility". The main
IRAF distribution includes a good selection of programs for
general image processing and graphics.
.
Other external or layered packages are available for
applications such as data acquisition or handling data from other
observatories and wavelength regimes such as the Hubble Space
Telescope (optical), EUVE (extreme ultra-violet), or ROSAT and
AXAF (X-ray). These external packages are distributed separately
from the main IRAF distribution but can be easily installed.
The IRAF system also the programmable Command Language scripting
facility.