Single-sided tape for repairs
Real Leather Tape
MastaPlasta sells both rolls of real leather tape and leather patches in a variety of natural colors. They also offer decorative patches, including a red heart and a leather band-aid
ONine As mentioned above, this brand comes in 45 different colors, including bright colors and neutrals
Bonaier leather tape comes in several different brown colors, as well as black and white, and can be used on other upholstery fabrics, as well as real and faux leather
Azobur comes in 14 colors, including black, white, and browns.
Numola Leather Repair Patch Kit comes in black, white, and several neutral colors. It is thicker than other patches and especially good for repairing leather in your car.