The 'Low-Tech' Whistle
- Detailed instructions for making fine whistles out of cheap materials, using only simple tools. Regularly maintained and illustrated with photographs and technical drawings, this is the place to start for those new to whistle making.
- http://guido.gonzato.googlepages.com/whistle.html

Jubilee Music Instrument Builders Resources
- Includes the free TWCalc software for Windows, which helps plan tone hole size and position for whistles and six hole flutes, plus Javascript calculators, fipple design information, and more.
- http://www.tinwhistles.us/experiem.htm

Flutomat Javascript Flute Designer
- A simple online calculator for size and position of tone holes for six and eight hole flutes.
- http://www.cwo.com/~ph_kosel/flutomat.html

How to Make a Low D Tinwhistle in a few Hours
- out of a copper pipe or an aluminum shower rod
- http://www.ehhs.cmich.edu/~dhavlena/low-d.htm

Introduction to Flute Acoustics
- The physics of air-jet instruments.
- http://www.phys.unsw.edu.au/~jw/fluteacoustics.html