Loosestrife - Golden creeping Jenny Lysimachia nummularia 'Aurea' is a fast-growing groundcover for shade or partial shade. It bears round chartreuse foliage and grows 2 inches tall. It can spread indefinitely.
Arenaria Wallowa Mountains / Wallowa Mountains Mossy Sandwort (Desert Moss) is a great groundcover plant with tiny bright green evergreen leaves. Looks great as a crack filler between flagstone and paving stones.