While looking for an open source publishing tool (such as Adobe InDesign or Microsoft publisher), I came across this site which lists popular comercial software and it’s counterpart in the open source world:
http://www.osalt.com/system-utilities
It seems that there are a lot of very powerful open source applications out there! Open source software can be great when you’re in a pinch, or need something simple to do the job, without costing you. But some times the comercial software is still the more powerful option, or sometimes even the only option.