Sansevieria (Sansevieria spp). Also called snake plant and Mother-in-Law's Tongue, this tried and true plant takes almost total neglect and scoffs it off. Got low-light interiors? Have almost no time to water? Don't like fussy flowers? Sansevieria is your plant.
The stiff, upright lance-like leaves typically have white or yellow edges or darker green stripes. Now before you say, "Yeah, my mom used to grow that plant — no thanks," take a look at some of the newer and different varieties. The one pictured here is Sansevieria trifasciata 'Black Coral' (shown with Aeonium and sedum); it features more rounded foliage and fits very well with contemporary interiors.
Water it once or twice a month and make sure the soil is well drained — never let it sit in standing water.
Tip: This plant will rot if you water it too much, so if in doubt, underwater.