DB_Browser is a CGI tool for developers working with any relational database supported by Perl::DBI. It easily facilitates searching, editing, and adding to tables within a database. While it can be used as a regular interface to database data itself, it works well as a supplemental tool for developers creating their own primary interface.
SSIComment is a simple database-backed comment system for websites. It uses server side includes (SSI) so you can easily add it to existing static pages without a lot of messy CGI scripts. SSIComment is great for adding interactivity to your site, building community around your content, and increasing repeat visits by encouraging discussion and debate.