SQL injection attacks can allow hackers to execute arbitrary SQL commands on your database through your Web site. To avoid these attacks, every piece of data supplied by a user on a Web form, through HTTP Post or CGI parameters, or other means, must be validated to not contain information that is not expected, GreenSQL is a firewall for SQL.
Link: Linux
With DrasticGrid, you can easily put a MySQL database table or view on a Web page, complete with editing, sorting, and pagination capabilities, and support for adding and deleting records.
Link: Linux
The Puppet project allows you to issue system administration commands to one or more machines, and will smooth over the differences between distributions for you. For example, if you want to install MySQL, that action should be your primary aim, and you shouldn’t have to worry about if the machine is running Maemo, Ubuntu, or Fedora.
Puppet frees you from thinking about the hardware architecture a system is using, what Linux distribution it runs, or where that particular machine happens to store its Apache DocumentRoot by using a declarative language to specify the system administration task that you would like to perform. Puppet has many built-in facilities, such as classes, which allow the different details to be smoothed over when Puppet rolls out the system administration tasks you have declared.
Link: Linux