Do you know Application Express (APEX) is free tool that comes pre-configured from Oracle 11g onwards. It is very easy to use tool to create database based applications. There are lots of use cases for using APEX by DBAs.
1. for creation of small utilities like- daily backup reporting
2. for creation of db portal kind of thing where your entire DB estate details are present
One can learn using this tool in less than 1 hr. there is no installation required. application created by APEX are web based applications and entire development in APEX is also web based.