Here you go:
SVP allows you to watch any video on your PC file with frame interpolation (like you can watch it on high-end TVs and projectors). It increases frame rate by generating intermediate animation frames between existing ones to produce very smooth, fluid and clear motion. The technology is well-known for a while ("TrimensionDNM", "Motion Plus", "Motionflow" and others), but now it's available for free to PC users with simple GUI and just a couple of mouse clicks.
SVP provides GPU acceleration and it's possible to watch FullHD 1080p-video recalculated to 60Hz in real-time with mid-range CPU and almost any GPU hardware.
SVP actually is not a video player itself, but it enables almost any player to play smooth video.
Yeah, also in 3D
First, it's free, second - if both Peter Jackson and James Cameron don't think the "soap opera effect" is something bad why should you?
"We are indeed shooting at the higher frame rate. The key thing to understand is that this process requires both shooting and projecting at 48 frames/s, rather than the usual 24 frames/s (The great majority of films have been shot at 24 frames per second since the late 1920s). So the result looks like normal speed, but the image has hugely enhanced clarity and smoothness. Looking at 24 frames every second may seem ok—and we've all seen thousands of films like this over the last 90 years—but there is often quite a lot of blur in each frame, during fast movements and if the camera is moving around quickly, the image can judder or "strobe." Shooting and projecting at 48 frames/s does a lot to get rid of these issues. It looks much more lifelike and it is much easier to watch, especially in 3-D." - Peter Jackson
"3D shows you a window into reality; the higher frame rate takes the glass out of the window" - James Cameron