Screwmez is a utility by Peter Worden that takes all the head scratching out of the three-wire method of screw measurement.

DOWNLOAD SCREWMEZ IN A ZIP FILE

Some people get a missing DLL message when trying to run Screwmez. This link should install the missing DLL and allow Screwmez to work:

download.microsoft.com/download/vb50pro/utility/1/win98/EN-US/Msvbvm50.exe

Gear Calculator by Dave Penney will work out all the calculations for making your own individual or pairs or gears.

DOWNLOAD GEAR CALCULATOR IN A ZIP FILE

DOWNLOAD GEAR CALCULATOR DOCUMENTATION AS PDF

These apps should run under modern versions of Windows including Windows 10.

Linux users should first install a Windows emulator like WINE.

Mac users should first install a Windows emulator such as Wieskin Winery or Virtualbox.

If you choose to download or use these apps, no warranty express or implied is given.