What about your toolbox?

For many companies doing development under Java is Maven a success factor in the development process. Maven gives you control of external dependencies and gives us freedom when it comes to IDE, test frameworks, build-servers, environment and deployment strategy.

From statistical material you will find that many Java projects are based on:

Linuxservers
Different GNU tools (development, deployment and production)
Maven as build tool as a standard
Eclipse as IDE
Subversion as version control (or Git)
Hudson as build server
The test environment is based on JUnit and Fitnesse

The different companies establishes a best practice for obtaining and use of open-source libraries.