What do you do with an excess of muslin cut-offs. They are good quality, but I have no clue which ones (if any) tie in to the other muslins I have on my shelves.

First : wash the fabric. I live with 2 teen-agers, 2 cats, and a rabbit. It has probably been washed, but heaven alone knows who has been in it since then ... with what.
So, washed it is.

Iron freezer-paper to the right side of it. No, wait, this is muslin, so it really doesn't matter which side it is. Now, for the sake of frugality, I ought to cut custom-sizes of the freezer-paper, to give me the best use of both fabric and freezer-paper, but I really can't be bothered.

Trim the fabric from the edges of the freezer-paper.
Re-iron the edges and corners (just to be on the safe side)
Pop your
Inklingo, shape-collection # 2 into the 'puter (no picture. I tried, but I am *not* a good photograper)

Print 1½" half-square triangles (HST). Inklingo gives you the finished size, so what comes out will finish at 1½". Printed, each shape will be more like 2½", but ... that includes seam-allowance on all sides :-) I have chosen to print this sheet of muslin in Inklingo colour # 02. I probably could get away with using the lightest colour (# 00), but ... my eyes are becoming middle-aged :-) besides, it doesn't seem to show on the front. Still, the lines are not nearly as visible in the picture as they are in real life :-)
Repeat the above as desired.
Trim.

Layer with coloured fabric
Sew along the dotted lines
Cut apart on the un-dotted lines. Trim.
Iron.

You are now ready to roll, making some of the many blocks that are possible with HST.
The real beauty of this is, that there is no measuring. No cut-off points (if you've followed the sewing-lines). Perfect size. Every time !!!
And *that* is why I love Inklingo.
Preparation is extremely fast, and the results are as close to perfect as it can be, if I just follow the lines :-)
And honestly ? My opinion is, that Inklingo is bloody brilliant (pardon my French).
P.S. You can download a free trial-version of Inklingo right
here. And yes, it is a LeMoyne star, and yes, it has triangles, 45-degree diamonds and squares. Lots of shapes for you to enjoy.