Yes, hundreds and hundreds is the straightforward answer to a straightforward question. I'd guess you want more info though, so you need to tell us the aspect (which way it faces), shaded or not, length and width and whether you already have things in it like a lawn, trees, patio, etc.

Bushes / shrubs, trees and perennials work all year round.
Easy shrubs include Hebes, Viburnums, Hypericum, Hardy Fuchsias, laurel, Spiraea, Elaeagnus
Easy perennials include japanese anemones, hardy geraniums, hellebores, heucheras, pinks
As Bamboo says there are loads to choose from.

Hello Guest,
You can use the GoY site's own search box (top right of this page) or just do a Google search to find what you want. Type in "reliable shrubs". I just did that and found escallonia which is pink flowering, very hardy, slightly prickly, also euonymus with nice interesting variegated leaves.. it's up to your own personal taste really.
If your garden is too big for you to manage, have you thought about arranging for someone else to do it for you?

The tone of your Question also seems to indicate an interest in low maintenance. Try clicking on the "L" in the alphabet below, and then clicking on "Low maintenance gardens".