There has been a chilling effect on a free software BR or BD player because of the DMCA and more. If you want to play BD content, I suggest you use the PowerDVD or other software and PLEASE get it with your hardware to save the cost of the standalone software.
Just to let everyone know, I've yet to find one. Unless you count the s/w bundle you may get with a new drive or system, don't expect to a freebie out there. I looked high and low with negative results. I wanted to head-off so-called complaints of PowerDVD players install for new blu-ray players just wasn't good enough or reliable(upgrades). While my new player will have PowerDVD it seems others just didn't like it and made bad reviews for it, I hope mine is OK. Please advise if you locate one. Thanks -----Willy