Here is a handy Excel spread sheet. Click on "Note Generator" below to access the file.
On sheet #1, Fret note generator, you can change the tuning by the pull downs at the 0 fret position and it will display the notes down the fretboard.
Sheet # 2, Scale Length, allows you to calculate fret spacing for different scale lengths. Simply change the scale length, hit enter and the calculation is performed.
Sheet #3, Note Frequency, gives the frequencies for various notes.
Sheet #4, Tension, lets you calculate string tension and is most useful for baritone owners that want to try new strings and tunings. At the top of the sheet is a link to D'Addario that you'll need for different string gauges and scale lengths. Simply find the unit weight and frequency and the tension is calculated for you. There are 6 sample already loaded for you.
Have fun and let me know if you need any help with this worksheets.