(or oscope) is a digital oscilloscope using input from a sound card and/or a ProbeScope/osziFOX.
http://xoscope.bstc.net/
information on limits for electric and magnetic fields
http://home.t-online.de/home/electrosmog/emf-exposure-limits.htm
program that will search through it's database (47,000 devices on this demo version) and it will give you a short description of the component
http://www.electronic-repair.com/
Implements the communications stack for semiconductor fabs based on SEMI standards.
http://member.nifty.ne.jp/BEE/
Flow diagram drawing software. 16 bits.
http://www.cetest.nl/zips/flow.zip
http://www.cetest.nl/zips/555calc.zip
Spreadsheet with macro formatted to work in Microsoft Excel 4.0 or greater.
http://www.wssh.net/~wattsup/audio/noise_at.zip
easy field line drawing with left (+charges) and right (-charges) mousebuttons
http://www.cetest.nl/zips/efield.zip