The Writer Will Take Your Questions Now (#156) -- Open Source vs. Commercial

Which software do you prefer to use for your writing and layout 

when you are writing or editing or putting a book together?

I am a huge fan of open source software and I prefer to use it whenever a useful tool is an option available for me. Some of my favorites are:

Paint.net
Open Office
Inkscape
Gimp
Audacity

That said, I have yet to find a suitable open source replacement for layout that can go toe-to-toe with InDesign. The day someone makes it available, that'll be the day I stop using InDesign.