The Hardware Handbook AWG wire table. Short but useful.
http://www.hardwarebook.net/table/AWG.html
AWG inches and mm conversion table
http://www.coilcraft.com/awg.html
Conversions between AWG number, diameter of the cable in mm, equivalent cross-section area in mm2.
http://www.tnt-audio.com/clinica/awg_e.html
AWG selection table for various loads
http://rbeelectronics.com/wtable.htm
JPG scan of a wire chart. very useful.
http://hot-streamer.com/TeslaCoils/Misc/WireGaugeChart.jpg
Gives examples and a calculator.
http://www.mikeholt.com/studies/vd.htm
The revised AWG Wire Table for Tesla Coils.
http://www.pupman.com/listarchives/1998/April/msg00222.html
Table containing AWG wire information.
http://www.phj.sednet.hu/hw/table/AWG.html