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This has multiple online programs that help you design various Kumihimo braids - not just the standard 8-strand round, but other ones too. Not only that, but it provides instruction diagrams for both disk and marudai!

This webapp enables one to inject randomosity into one's multicoloured projects; rather than doing, say, one row of Colour A, one row of Colour B, one row of Colour C, this helps one mix them up a bit. You choose from a palette of colours (not a lot, but a fair amount), put in the row-thickness one accepts, and it will generate a random pattern (e.g 4 rows of A, 2 rows of C, 1 row of B, 6 rows of C etc). If you don't like the pattern, refresh the result and it will give you a new one.

Pretty nifty.

Custom-sized box templates! For the kind of boxes where you cut out the template and glue it. Quite a few different designs - not really complicated ones, but a good collection nonetheless.

Ring calculator, calculates number of rings needed per square foot. Input in inches. Ring calculators for other weaves on the same site.