Pixii+ has a Leica M lens mount and currently there are 83 native lenses available for this mount.
The latest released lenses that are compatible with the + (A2572) are the Leica M 35mm f1.2, the Thypoch 21mm f3.5 and the Thypoch 21mm F1.4 M.
Pixii+ doesn't have a sensor based image stabilization system but
0 of these lenses already comes with optical image stabilization.
Since Pixii+ has a APS-C sensor, it has a focal length multiplier of 1.5x so you have to multiply lenses original focal length with this multiplier to find the Full Frame equivalent focal length of the lens when mounted on + (A2572).
You may also also be interested in these:
Pixii+ Lenses with Image Stabilization
Pixii+ Lenses with Weather Sealings