http://www.ks.uiuc.edu/Development/MDTools/pdbcat/
A tool to convert from the nasty column / fixed-width ‘fortran like’ PDB fileformat to a more reasonable unix-like whitespace delimited fields, and back again.
I had to add ‘using namespace std; ’ to line 24 of pdbcat.C to get it to compile (otherwise “error: ‘cerr’ was not declared in this scope”).