The most important feature of the WWW is linking. So...
Software
Firefox - The
BROWSER. Period.
MPlayer - The BEST media
player ever conceived. It plays anything on any hardware. A must
have.
GNU/Linux
Debian - A GNU/Linux distro. In
many cases they make security patches available in a very
short time.
Fedora - A new distro
(born from the ashes of RH 9.0). It has that good-old Red Hat
feeling.
Freshrpms - This site
ROCKS. All the multimedia software excluded from Fedora can be found
here in RPM format.
Mathematics & Computer Science
Italian IOI - Italian IOI
pages. Lots of problems (and solutions).
MathWorld - Ever read a
work referencing fearsome mathematical structures? MathWorld was made
to help you.
Good people
Electronic Frontier Foundation -
Defending Freedom in the Digital World.
Emergency - They offer medical
assistance to innocent war victims. Please support their work.
Free Software Foundation - The creators
of free software.
Independent Media Center -
Being able to see things from a different perspective is always
useful.
Friends
Luca Foschini - I've
worked with Luca for the longest time. He's a good friend - truly remarkable, considering he's an engineer 8^) .
Maurizio
Sambati - A friend - born in Firenze - that has
voluntarily chosen to live in his
beloved Pisa 8^).
Stuff-that-I-love
Buffy the Vampire Slayer - She saved the world. A
lot.
新世紀エヴァンゲリオン - IMHO, the best アニメ ever.