Heathers are one of my favorite winter-interest plants. There are Ericas (Heaths) which bloom around November and December, Daboecia (Irish Heath) which bloom spring to late fall, and Callunas (Scotch Heather) which bloom in summer but often have vibrant winter foliage.
They are very low-maintenance plants, but they do need pruning once a year after they bloom. Check out this video on how to prune a Scotch Heather in the fall; you can also use the techniques shown to prune a Daboecia in late summer, or Erica in winter.
(My employee took this video when we were out doing some garden cleanup, and an interested fellow wandered up to watch. We get a lot of local color here in Arcata!)
Fiskars Power Gear Hedging Shear (Video review of the tool I prefer for pruning Heathers)