dpkg -l | grep mysql
ii  courier-authlib-mysql                  0.59.3-2ubuntu1                      MySQL support for the Courier authentication
rc  libapache2-mod-auth-mysql              4.3.9-2.1ubuntu1                     Apache 2 module for MySQL authentication
ii  libdbd-mysql-perl                      4.004-2                              A Perl5 database interface to the MySQL data
rc  libmysqlclient12                       4.0.24-10ubuntu2                     mysql database client library
ii  libmysqlclient15-dev                   5.0.45-1ubuntu3.1                    MySQL database development files
ii  libmysqlclient15off                    5.0.45-1ubuntu3.1                    MySQL database client library
ii  mysql-client                           5.0.45-1ubuntu3.1                    MySQL database client (meta package dependin
ii  mysql-client-5.0                       5.0.45-1ubuntu3.1                    MySQL database client binaries
ii  mysql-common                           5.0.45-1ubuntu3.1                    MySQL database common files
iHR mysql-server-5.0                       5.0.45-1ubuntu3.1                    MySQL database server binaries
rc  php4-mysql                             4:4.4.2-1.1                          MySQL module for php4
ii  php5-mysql                             5.2.3-1ubuntu6.3                     MySQL module for php5
rc  php5-mysqli                            5.1.6-1ubuntu2.7                     MySQL Improved module for php5
ii  postfix-mysql                          2.5.1-1~gutsy2                       MYSQL map support for Postfix