Freshmeat.net - Contains up-to-the-minute information on new software releases for the Linux operating system. Also has a huge database of Linux software, most of which is free. My second favourite site on the WWW after Slashdot.org.
Slashdot.org - A news site with up-to-the-minute information on developments in computer technology and science. Particularly centered around the open-source movement and Linux. The first site I look at when I log-on.