Sound generators?
 

I'm extremely new to the wonderful world of technology, when it comes to midi use. I operate a Korg keyboard at church, and I'm wanting to find software (preferrably free?) that I could load into my laptop to add various additional voices to the keyboard. Can anybody help me?

Hey! There's a program called MuLab that has a free version and sound filters, synthesizers, etc. I believe its midi can be synced with an external keyboard like yours. I'm not sure how you plan on hooking the keyboard up to your computer, but that's a different story. Maybe you have a system already, otherwise you may want to pick up a cheap mixer.