This is not a list of recommendations as I have not compared these brands. Even the cheapest adapters available from China on eBay are made of aluminum and brass and might very well provide an excellent fitting for your lenses. I have converted all selling prices to US dollars but this does not indicate shipping charges or ease of purchase depending on where you live.
All but one of these adapters assume your lens has an aperture ring; if not, you will only be able to use the lens wide open. The adapters provide no electronic coupling at all. However, they all (should) latch to the aperture lever, so that stopping down the lens is automatic. With the auto-exposure features of the MFT bodies, they are very convenient to use in aperture-priority mode.
Novoflex offers an adapter with aperture control ring, so that newer digital lenses can be used easily on MFT bodies. Very expensive at $240.
Voigtländer have an expensive adapter. I have no idea why it should cost $179.
Fotodiox offers a simple adapter for $40 and a Tilt-Shift adapter for $130. Anyone have experience with that?
jinfinance sells an adapter for $50.
Rainbow Imaging sells an adapter for $23.
Rocks Photographic sells the PIXCO adapter for $22, but this same Chinese brand is available on eBay for $18 including shipping.