'Immergrünchen' - Already popular in Europe, this sedums' vigor reminds me of 'Weihenstephaner Gold'. It most closely resembles kamtschaticum but the evergreen foliage is a bit larger and wider with somewhat scalloped edges. It too has good fall color of oranges into red. The flower is yellow just above the 4" tall foliage. Full sun, well drained soil. (Groundcover.)
 

05 'The Edge' - Another variegated form of kamtchaticum, this one emerges with a bright yellow edge and fades to a lighter green  in summer. Glossy foliage more in the line of ellacombianum.
We received this from breeder Ed Skrocki.

ellacombianum - The two main differences compared with the species are a slightly more upright habit but still only growing 6-7" tall. Then there's the give away foliage that is always a shade lighter green, slightly glossy and has amazing fall color. Well worth planting for foliage effect alone. Golden yellow flowers like the species. Deciduous.

Sedum lydium Mossy Stonecrop

‘05 Reminds me of a green hispanicum. Thin red stems sprawl
around with bright green balls of foliage. Grows in loose mounds 2-3" tall.

Another one with great vigor reminiscent of 'Weihenstephaner Gold'. The growth habit is the main difference. A bit taller and sprawling while the foliage too is a bit wider but still only 1/4"- 3/8" wide. Great red fall color. Yellow flowers to 5". Full sun.
 

'Striatum' - It's hard to mistake this sedum due to its 1" long slender leaves usually only 1/8" wide and thick they are almost needle like. They also tend to have some red highlights through-out the season. Deep red fall color too. Yellow flowers.