Mine would be the osho zen tarot.
It is mainly used for self-reflection and inquiry and not so much to predict future events. But you can also work with other peopl, if they want to have insight into a spiritual problem or into themselves. The artwork on the cards is really cool and inspiring and you can have a great experience by just meditating on them.
It comes with a neat little book, that explains each card in detail.
If you like meditation and zen I really recommend this.
But even if not you should check it out, most people I worked with really liked it.
More cards:
