If your projector is capable of playing SBS (side by side) or OU (over under) then virtually any video player can play those files. Search in Youtube for 3D, play the video in full screen you should see two images side by side (or OU), in projector menu enable 3D SBS (OU), turn on your glasses. To play full screen frame packed is much more difficult as your HDMI must be 1.4 and only ISO files played with PowerDVD work, their are other options I won't go into here.
EDIT: the easiest and cheapest is to buy a 3D capable BR player with 3D BR disc.
"Smart enough to know better, to old to care" ------ Dedicated Home Theater, Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 10TB DroboFS NAS