FORTRAN 90
This program can move the coordinates of a system around the center. This is specially useful for molecules in *.xyx file format.
This is made by calculating the X-coordinate, Y-coordinate and Z-coorinate averages and substracting each average on each coordinate from the original data. New coordinates look like: ((x - X average), (y - Yaverage), (z - Zaverage))
I upload the program and a data example.