They are known as evergreens or needle-leaved trees but there are some trees that are not. The other type is deciduous which are hardwoods whereas conifers are also known as softwoods.
Coniferous trees are gymnosperms. They bear cones, hence the name coniferous. These include pines, spruces, larches, cypress, and others. Many have narrow leaves called needles. Many are evergreen, but not all.