Traveler's leather kitchen knife roll
A few sources of information on the tools and techniques used in hand and machine sewing leather.
Hand sewing leather
Leatherworking of the Middle Ages - Threads in Sewing Leather by Marc Carlson is a good discussion of the threads, needles and techniques used in sewing leather in the Middle Ages.
In my References
Industrial Sewing Machines and Supplies - I have an old Juki 562 industrial sewing machine I use for my leatherworking and here I collect information useful in maintaing and using the machine.
How to Make a Foam Cushion - Measure the space you need to fill with cushions. Draw a pattern if needed. Sew your cushion covers to have the dimensions of the space they need to fill.