All plants need water to survive. However, like plants that require more water, there are plants that grow in a lack of water. They are the best drought tolerant plants and can live without water for a long time.
Creeping Sedum is fast-spreading, drought tolerant and easy to keep in check. It grows in the hot, full sun or in the shade. It doesn't seem to have any special soil requirements. In June, it's covered with tiny yellow flowers.