Lab & shop supplies

• McMaster-Carr
• Ted Pella, Inc.
• Wilton Technologies - Burner nozzles
• Joppa Glassworks, Inc
• The Pottery Supply House
• Fibre-glast
• Midwest Tungsten Service
• Maxwell High Voltage Capacitors
• AnTek Toroidal Transformers
• Pneuaire - Pneumatic Parts
• Valutek - Cleanroom products
• Macken Instruments (Power Probes)
• G&S Dye (silkscreening)
• AALamps (spectroscopy light sources)
• AlloyShop UK
• Wale Apparatus (Glassblowing supplies, Fused Quartz)
• CERAC (Magnesium Fluoride)
• Active123 (Ferric Chloride)
• MableAudio China (Tube Audio Parts)
• Industrial Netting (Ni/Cu/Au Mesh)
• Unique Wire Weaving Co

Shipping / logistics

• TST Overland
• Craters & Freighters
• ULine supplies

Electronics supplies

• Digi-Key
• Mega UK
• Mouser
• Jameco
• Think & Tinker

Computer parts

• PriceGrabber.ca
• EndPCNoise.com
• TigerDirect.ca

Chemicals

• Anachemia
• A&K Petrochem
• Tekniscience
• Biobar
• Teknibulk.com

Scientific Glassblowing

• ECU - Scientific Glassblowing Basics

Vacuum tubes

• Claude Paillard - Les Lampes Radio
• Teralab - Amateur Physics Experiments
• Sam Barros' PowerLabs
• Tube datasheets (drtube.com)
• Rétro Forum - Amateurs de TSF et reproduction du son
• Antique Wireless Association
• Spark, Bang, Buzz and Other Good Stuff
• Getter Materials
• Tubes 201 - How Vacuum Tubes Really Work
• TDSL Tube Search
• Frank's Electron Tube Pages

Vacuum tube based projects

• HeadWize: OTL Tube Headphone Amp
• CGS - Ken Stone's Modular Synthesizer
• The Emperor's New Amplifier
• Metasonix - Vacuum-tube music synthesizers
• The Spud SE
• audioXpress Audio Classroom Series

Electronics

• Putting together an Interdigital Filter
• SoftVGA - AVR based Software-only VGA Display Generator
• Ronja - Optical Data Links

Engineering Tools

• Bolt Hole Pattern Calculator
• Density Equation and Formulas Calculator

Cooking

• Nekhbet recipes

Math & algorithms

• Handbook of mathematical functions
• Numerical Recipes - The Art of Scientific Computing
• LUSOL: Sparse LU for Ax = b
• Modified Nodal Analysis
• Radix Sort Revisited
• NIST Digital Library of Mathematical Functions

Software

Libraries

• The Xlib Manual
• GLX Portability Notes
• OpenGL Reference Manual

Server software

• mod_perl performance tuning
• A HOWTO on Optimizing PHP
• sbox: Put CGI Scripts in a Box
• Apache + Chroot + FastCGI + PHP FAQ
• RRDtool tutorial

Vacuum & induction

• The Pump Works
• Absolute Vacuum Services Limited
• High Frequency Induction Heating
• Induction heating

Processes

• Nanometer Pattern Generation System
• Electropolishing of aluminum & stainless steel
• PlatingSales.com

Metal LPs

• VinalEdge
• Metalrecords Online A-M
• Metalrecords Online N-Z

Machining & CNC

• Milling Machine CNC Conversion
• Z-axis mods for IH mill
• IH mill one shot oiling
• NC Drill File Format

Unsorted

• Interfacebus.com
• Unicode Code Converter v6
• MIT OCW - 3.091 Introduction to Solid State Chemistry
• Hack a Day
• Hacked Gadgets
• Instructables
• The Sky at Night
• Richard Nakka's Experimental Rocketry Web Site
• GR-5 Turboshaft Engine
• The AstroStat Slog