Aside from the computer stuff, I used lots of tools and supplies, so many in fact, I'm not sure if I can remember them all! I didn't document this during the project. I wanted to add prices next to each item but I already had most of these things and I don't know what they cost. That's why only some of the items have prices beside them. Okay, let's see... In no particular order, I used:
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Tape measure
Tiny philips screwdriver (No. 0)
Regular ol' philips screwdriver
Pocket knife
Needle-nose pliers
Regular ol' pliers
X-acto knife
Utility knife
Wire stripper
Sheet metal shears
Regular ol' scissors
Soldering iron (35 watt) - $8 at RadioShack
Rosin-core solder - $3 at RadioShack
Hot glue gun - $6 at some craft store
RJ-45 jacks - $3 each at The Home Depot or much cheaper elsewhere!
RJ-45 plugs
Punch-down tool
CAT5 crimper
CAT5 cable with solid core wires
Sharp pencil
Felt tip marker
Electrician's tape
Box tape
Double-sided clear tape
T-square
Good graduated scale (a nice metal ruler)
Clamps
Electric drill and assorted bits
Multimeter - $40 at RadioShack
Kilowatt-hour meter - $25 on eBay
Jeweler's loop magnifier
Cigarette lighter
Bright lights - $2.50 on clearance at Target
Digital camera, of course!
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I already had most of those tools but I had to buy the following supplies:

Picture frame - $18 at IKEA
Matting for frame - $19 at Frames Unlimited
Super strong epoxy - $5 at a drug store
Super glue - $3 at same drug store
CPU thermal compound - $6 at RadioShack
Wire shrink wraps - $3 at RadioShack
Rubber gloves - $3 at drug store
Momentary pushbutton switch - $4 at RadioShack
Double-sided "sticky strips" (foam things) - $4 for a package of these at a craft store
Sticky felt pads - $6 at Target

The picture to the right shows most of the parts left over. See anything you want? Sorry, I already threw it out.