PDBManip
PDBManip is a free program for editing PDB (Protein Data Bank) Files
... languages such as Awk and Perl are available, and many users, uses these to do their works. However, in developing PDBManip, I have customized scripting language, by adding predefined PDB related variables and functions, in such a way that a user with a very basic knowledge of programming can easily write very eligible scripts, even for very complicated editing and manipulating tasks. In this way, proficiency in computer programming, that is a must in using Awk or Perl, is not a barrier.