Crosti!

Cstitch turns an image into a cross stitch pattern and allows you to edit the generated pattern. The final product is a pdf of the cross stitch pattern and a list of the colors in the pattern.

Embroidermodder is a free machine embroidery software program which allows editing, scaling, and translating sewing machine embroidery files to a variety of formats. It allows the user to add custom modifications to their embroidery designs.

PCStitch is advanced, but it's perfect for any cross-stitcher.

The KXStitch projects aim is to produce software to allow the creation and editing of cross stitch patterns, either from imported images or directly by the user.