1. Sewing machine - I've done some projects by hand, like a puff quilt (AKA biscuit quilt) pillow (in the 1980s), but I can't imagine sewing garments or quilts by hand.
2. Rotary cutter and mat - I learned to quilt around 1990 and cut out plastic templates, traced them onto fabric, and the cut the fabric with scissors.
3.
Slotted cutting ruler - This has significantly sped up my cutting and increased my accuracy. I am loving it!
4. LED light strip for my sewing machine - it's so nice to have bright light where I need it.