Use this site Yarn Calculator to make your project calculations for for how much warp and weft thread is needed.
Yarn Calculator
Category: Software
Color Picker
A color picker. Use your picture or select from theirs to generate a palette of colors for use in your next design.
Tartan Maker
Tartan Maker is a great tool for quickly playing with color and threads to design your own tartan. Download the .png file and use it in your weaving software as a profile draft.
Stripe Generator
Stripe Generator software that allows you to download .png files of the stripe patterns that you generate. Great for planning stripes and plaids including tartans.