Because SQLPlus wasn't good enough....
If anyone uses ORACLE for a database server, then you'll love SQLPlusPlus.
Syntax highlighting, a nice Grid to view your queries.
A command history.
Support for running scripts.
I was sick and tired of SQLPlus, so I coded my own and now I use it all the time for complex queries and for simple ones...
Here is a screenshot of the latest version, with options to view your data how you want it.
You can download a demo below, you will need oracle server (or some connection that allows you to connect remotely)