If I may, I would add a list. These are from 'Waterwise Plants for Sustainable Gardens / 200 Drought Tolerant Choices for All Climates' by Lauren and Scott Ogden. Mine is a library copy, so your local library may have it also. I'm a great admirer of their books and what I really like is that right away it says that all of the plants in the book will get by on one inch of water (rain or irrigation) every two weeks in the hottest part of the peak growing season... once established
I really appreciate that since the term drought tolerant can seem variable and we get no rain here in the summer. It's the first time I've come across a specific amount mentioned.
I would also add that I like the fact that High Country Gardens lists in their catalogues which plants are rabbit and deer resistant.
Achilliea 'Moonshine'
Alyssum montanum / 'Mountain Alysum'
Baptisia minor / 'Wild Indigo'
Calylophus hartwegii / 'Sundrops'
Centranthus / 'Jupiter's Beard'
Dalea purpurea / 'Purple Prairie Clover'
Eryngium planum/ 'Blue Sea Holly'
Linum lewisii / 'Western Blue Flax'
Nepetas / Various Catmints
Papaver orientale / 'Oreintal Poppy'
Ratibida / 'Prairie Coneflower'
Satureja / 'Purple Mountain Savory'
Ruella humilis / 'Wild Petunia'
Scutellaria resinosa / 'Prairie Skullcap'
Sidalcea / Checkerbloom'
Stachys coccinea / Texas Betony'
