Euonymus fortunei from Asia is a remarkably hardy and incredibly diverse species including trailing ground covers, climbers and even quite large shrubs.
In the case of variety radicans it is a bit of a trailing ground cover that will also climb up any suitable surface and in both instances it is a light open plant that will allow bulbs or any other plant to grow though it, unfortunately weeds included!
Its evergreen foliage is deep green and narrow with a central white stripe making it a subtly attractive plant in the ground or a pot.
It is drought tolerant as well as happy in sun or shade and I have found it highly useful in many applications around my garden as I am sure you will.