ronys writes "The venerable USENIX organization has written a fine response to SCO's letter to Congress. As they point out, 'USENIX was here before SCO. USENIX was here before Linux.' Short and well written." And Reece Arnott writes: "As part of the NMap Press Release for the latest version of NMap, is a statement that explicitly revokes SCO's licence to redistribute it. From the press release: 'SCO Corporation of Lindon, Utah (formerly Caldera) has lately taken to an extortion campaign of demanding license fees from Linux users for code that they themselves knowingly distributed under the terms of the GNU GPL. They have also refused to accept the GPL, claiming that some preposterous theory of theirs makes it invalid (and even unconstitutional)! Meanwhile they have distributed GPL-licensed Nmap in (at least) their "Supplemental Open Source CD". In response to these blatant violations, and in accordance with section 4 of the GPL, we hereby terminate SCO's rights to redistribute any versions of Nmap in any of their products, including (without limitation) OpenLinux, Skunkware, OpenServer, and UNIXWare. We have also stopped supporting the OpenServer and UNIXWare platforms.'"