Mysql-change-charset is a project mainly written in Python, it's free.
Changes the mysql text varchar charset and collation on the fly
Simple script to change the charset and collation of the text fields in a mysql database.
How to use:
Just fill in the db details in the variables:
DBHOST='127.0.0.1' DBUSER='root' DBPASS='' DBDB='n_demot'
also the required charset and collation:
CHARSET = 'utf8' COLLATION = 'utf8_general_ci'