Zazen is essentially Samatha (Zen <- Ch'an <- jnana). Ashtanga Yoga is Samatha or Vispassana while using body posture as the concentration object, similar to Zhang Zhuan from the Chinese traditions. The devotional practice of Bakti Yoga results from Samatha and Vispassana, using the meditational diety or compassion as the concentration object.

There is the practice, and there are names like "samatha" and "vispassana". The basic practice is the same, regardless of the tradition. Different traditions will have different maps, different flavours, and some will work better for specific individuals simply because they were designed for that individual's hangups.

About the only thing does not fall into samatha or vispassana is guided meditation. But that's actually samatha in disguise. That is, guided meditations are not as effective without being able to hit some of the deeper jnana. Without skill in samatha, guided meditation is more or less a relaxing daydream.

ALL of them require mindfulness. It's not that you find a specific practice that exercises mindfulness; it is that you are mindful of your practice -- be that sitting on a cushion or coding on a computer.

Thanks!