Panasonic designs and makes their own lenses, as well as in cooperation with Leica. The US distributor doesn't have a dedicated page for lens information, but you can find specifications and other information on their shop-and-compare page here.
Currently available Panasonic m4/3 mount lenses:
- Lumix G Vario 7-14mm f/4 ASPH
- Lumix DG Vario 8-18mm f/2.8-4 Elmaret
- Lumix DG Vario 10-25mm f/1.7 Vario-Summilux
- Lumix GX 12-35mm f/2.8 ASPH
- Lumix GX 12-35mm f/2.8 ASPH II
- Lumix Leica 12-35mm f/2.8 Vario-Elmarit ASPH OIS
- Lumix G Vario 12-32mm f/3.5-5.6
- Lumix G Vario 12-60mm f/2.8-4 Power OIS
- Lumix G Vario 12-60mm f/3.5-5.6 Power OIS
- Lumix G Vario 14-42mm f/3.5-5.6
- Lumix G Vario 14-42mm f/3.5-5.6 II
- Lumix G Vario 14-42mm f/3.5-5.6 ASPH PZ X
- Lumix G Vario 14-45mm f/3.5-5.6
- Lumix G Vario HD 14-140mm f/4-5.8 ASPH Mega OIS
- Lumix G Vario 14-140mm f/3.5-5.6 ASPH Power OIS
- Leica 25-50mm f/1.7 DG Vario-Summilux
- Lumix G Vario 35-100mm f/4-5.6 ASPH Mega OIS
- Lumix G 35-100mm f/2.8 OIS
- Lumix G 35-100mm f/2.8 OIS III
- Lumix G 35-100mm f/2.8 OIS II 2
- Lumix G Vario 45-150mm f/4-5.6
- Lumix G Vario PZ 45-175mm f/4-5.6 ASPH Power OIS
- Lumix G Vario 45-200mm f/4-5.6 Mega OIS
- Lumix G Vario 100-300mm f/4-5.6 Mega OIS
- Leica Vario-Elmar 100-400mm f/4-6.3 Power OIS
- Leica Vario-Elmar 100-400mm f/4-6.3 Power OIS II
- Lumix G Fisheye 8mm f/3.5
- Leica 9mm f/1.7 DG Summilux ASPH
- 3D Lumix G 12.5mm f/12
- Lumix Summilux ASPH 12mm f/1.4
- Lumix G 14mm f/2.5
- Lumix 15mm f/1.7 Summilux
- Lumix G 20mm f/1.7 ASPH
- Lumix G 20mm f/1.7 ASPH II
- Lumix G 25mm f/1.7 ASPH
- Leica DG Summilux 25mm f/1.4 ASPH II
- Leica DG Summilux 25mm f/1.4 ASPH 2
- Panasonic G Macro 30mm f/2.8 MEGA OIS
- Panasonic Lumix G 42.5mm f/1.7 OIS
- Leica DG Nocticron 42.5mm f/1.2 OIS 2
- Leica DG Macro-Elmarit 45mm f/2.8 ASPH Mega OIS
- Leica DG Elmarit 50-200mm f/2.8-4 ASPH
- Leica DG Elmarit 200mm f/2.8 Power OIS
- Panasonic Lens FAQ
Note that Panasonic does not always build optical stabilization into its cameras, but does build it into their lenses, the opposite of Olympus. You can use Panasonic OIS lenses on Olympus m4/3 bodies.