Links

ticalc.org - The biggest, baddest English TI calculator site on the internet. Bigger than TI's official site, and better by far. (Listed second on Google when you look for "TI Calculator") Has programs for every calc, as well as Mac, Unix, Linux, DOS, Windows, and a lot of others you've never heard about.
education.ti.com - TI's official calculator website. Has the latest ROM updates, but not much else of interest for free.
TI-89 Hardware - A great place to get all kinds of information about the TI-89's hardware, from both a programmatical and physical standpoint.
Richfiles - Pretty cool page about really cool hardwaarre mods to your calc.
TI-FR - On the same par as ticalc.org, only in French. Use the Google Toolbar (for IE) or something similar to translate it.
michaelv.org - Site of Michael Vincent, a guy who knows quite a lot about the TI-83+ hardware and software.
Detached Solutions - Cool site, with software for TI-83+ and TI-89/92+. (Their software is mostly for the TI-83+.)
TI Calculator Hardware Center - The name just about says it all, although many of the links to hardware are dead.

Electronics Goldmine - A great place for anything discount electronics
Wilco Corporation - Manufacturer of inductors, you can get free samples.
The Circuits Archive - Very cool site with lots of electronic ciircuits.
CrazyChucks.com Apple Lisa Page - Many pictures of the Apple Lisa. Be forewarned: this page has many pictures, and so takes a while to load.

The Linux Counter - Count yourself! Count your machine! (I have been counted.)
The Internet Archive - This is a repository for old versions of sites. This is easy to get lost in - look at the first version of msn.com.
HAKMEM - A site with the venerable HAKMEM, Hackers' Memorandum.
The Jargon Dictionary - Almost belongs under the Humor label at times, but fun and informing to read all the time
Esoteric Programming Languages - I especially love the concept of Piet, a graphical programming language.
efg's Color Reference Library - Links to anything about color. The conversion section is useful.
SQL Slammer Source Code - It's remarkable how small this virus is. (Annotated disassembly)
4D Rubik's Cube - Definition of sexy Java applet.

Internal Obfuscated C Contest - Programmer humour.
A pretty awful site - This one's a parody.
Eternal Life Device - Another parody. (It would behoove the browser to read the patent-sadly, the United States Patent Office is accepting patent spam like this. It doesn't even work according to the description-the iron atoms in the blood are entirely unaffected by magnetic fields.)
Klingon Language Institute - Speak Forcefully.
Enron for Your Kids - Inexplicably blocked by my school filtering. Totally inoffensive to anyone except for Seattle Schools administrators.
The Worst Phonetic Alphabet - The usual phonetic alphabet (in case you didn't know) is "alpha bravo charlie ..."