From Mar. 15 to Mar.17, Leawo.com offers the free MKV converter then you can view mkv movies on your Mobile device.
http://www.leawo.com/mkv-converter/
Just click the Get Code Now button and share the promotion on Twitter or Facebook and then input your name and email, and then you can get the free registion code to activate the software.
Besides, you can get the 50% off coupon code:MKVGW50(Expired on Mar.20) for video converter ultimate and Blu-ray Copy(Win+ Mac).