I've been using the SQLExplorer plugin for Eclipse, a JFacedBC-based database navigation tool, for the last month and it rocks.

I've been working in different places and with different database vendors - MS SQL Server, Oracle and Informix - and some software implicates inter-operating all these vendors.

The UI of this program allows me to develop my java programs and mantain active connections to all databases - actually allow connection to virtually any datasource - and see my table, test my query. All of this well integrated in my eclipse workspace. Really worth a try.

https://sqlexplorer.dev.java.net/

Vacations have ended for more than 2 weeks now and I'm back to the regular pace at work.
I will also try to post more regularly some things