The documents folder contains some papers to help to understand Gabor Filter.
There are 3 projects for Gabor Filter visualization. All of them is in one solution created by VS2013, depending OpenCV.
And there is another project for Gabor Filter visualization called [Gabor Filetr GUI] [1]，which written by Matlab.
[1]: http://cn.mathworks.com/matlabcentral/fileexchange/30107-gabor-filetr-gui?s_tid=srchtitle