One of the requested features in the EasyWorship forums is for EasyWorship to have support for a 3rd screen output. This would be so that a feed can be sent some where else, but display something slightly different. -eg send a feed to the Music area so the band see just the lyrics, whilst the main projector has the lyrics and a pretty backgrond or fancy video background. The musicians are not really interested in nice things like backgrounds - they simply want to see the words.

EasyWorship only supports 2 screens, the screen for the operator and a screen for the projector:

However, it is possible, with an extra program to enable a 3rd screen, such as:

This program is quite simple, it mirrors part of the main screen (eg the Preview area) and magnifies it and allows you to move it to your third screen. You can define the section it mirros, and the output settings (ie which screen and size etc)

This does require you to have support for 3 monitors in your hardware (ie an extra graphics card). There are some limitations, but it may be just what you need, plus it' free!

Take a look at the post by 'ProgrammingJeff' on this page in the forum for further details and a download link. 

Video Amplifiers

If you do want to send exactly the same image to multiple screens, then it's not 3rd monitor support you need, but you need a Video Distribution Amplifier.