How to increas the fps of a video by adding "logical" frames?

Hello, I want to know, which software can increase te framerate of a video like this:

http://hfrmovies.com/avatar_60.mkv

This is a sample video of Avatar. The original video is 24fps, but somehow it was re-rendered into 60fps, and it looks absolutely natural.
please, tell me how can i do such kind of things? Which software can increase the fps like this sample?

Thanks a lot......

Here is the article about it:

http://www.hfrmovies.com/2012/12/30/...ps-and-60-fps/