SuperReplace is a program that I wrote using the language Perl.

Super replace can find and replace a word in a single file or files in an entire directory. It also sports a scripting facility that you can use to setup multiple replacements.

Documentation

Usage: superreplace [OPTIONS]
            --in      File|Dir    Input File (or Dir to recurse)    
            --out     File|Dir    Output File (or Dir)
            --o                   Overwrite input
            --find    Word        Word to find
            --replace Word        Word to replace with
            --s       ScriptFile  Script Mode

To simply find a word and replace it in a file you would type:

If you however wanted to leave the original file intact and have a copy with the replacements then you could do:

You can specify a directory instead of a file, in that case the directory will be recursed, all of its files and all of the files in it's sub-directories etc. etc. will be processed. Similarly if you want to leave the original files intact you can specify and output directory.

If you want to replace more than one word then you can use a scriptfile instead:

The scriptfile is just a simple textfile with the format:

word1tofind -> replacewith
word2tofind -> replacewith

The space before and after the 'arrow' are required. If you prefix a line with # it will be treated as a comment.