Catharsis writes: "Jorrit Tyberghein, leader of an excellent open-source, cross-platform 3d engine recently posted a dialog he engaged in with Richard Stallman, leader of the Free Software Movement over whether it was kosher to sign an NDA with Sony to write a PS2 API wrapper. Now, I'm no pro when it comes to Open Source vs. Free Software vs. open source, but this dialog left me feeling a bit unclean. I'd be interested to see how Slashdot users react to the conflicting views portrayed here. Jorrit's stance was that he wants his software to be available to the largest possible audience. Richard's response was that any (ANY) concessions to a non-Free mode of thought was a failure and a defeat." This gets down to the core differences between 'Open Source' and 'Free Software.' Worth the read.