The 28BYJ48 Uni-polar 5VDC 5-Pin stepper motor requires a ULN2003 Motor Driver if it is to be used with a microcontroller such as the Arduino.
This is a 6 volt 4 wire miniature 2 phase 20mm. stepper motor with 10 tooth gear and with 15° step.
The ST-14HK2401 is a 36mm DC6~12V 2-phase 4-wire stepper motor 0.9 degree steps.
The ST-25SPG0001 is a 12 Volt 0.2A 4-phase/5-wire Stepper Motor 25mm, 7.5 degrees.
This is a 2-phase 15mm mini round Stepper Motor with 4-conductor JST connection, 5V, 18 ° Step.