Sony A7R has a Sony E lens mount and currently there are 215 native lenses available for this mount.
The latest released lenses that are compatible with the A7R are the Samyang 14mm F2.8, the Samyang 85mm F1.4 and the Sony FE 50mm F2.5 G.
Sony A7R doesn't have a sensor based image stabilization system but
27 of these lenses already comes with optical image stabilization.
Since Sony A7R has a Full frame sensor, it has a focal length multiplier of 1x so lenses will provide their original focal length on A7R.
You may also also be interested in these:
Sony A7R Lenses with Image Stabilization
Sony A7R Lenses with Weather Sealings