Calculators
Software filmmakers calculators
http://www.encorevideo.com/KillerTools/avidcalc.html
http://www.encorevideo.com/KillerTools/telecalc.html
http://www.cs.ucla.edu/~simonw/DoF/
http://www.cs.ucla.edu/~simonw/fov/
http://www.cs.ucla.edu/~simonw/sunpos/
http://w3.one.net/~menyhert/java/tcalc/TCalc.html
Hardware timecode calculator
http://www.calculated.com/mcfm.html