I put down simple tools on this site.
These is made by me (Keisuke Minami)
These Ruby program lisence is "Ruby's license".
If you want to know "Ruby's license", show this site(http://www.ruby-lang.org/en/LICENSE.txt).
Other programs is GNU lisence.
・dir_tree
This program show directory tree.
・image_size
get image size
image format type: ["PCX", "PSD", "XPM", "TIFF", "XBM", "XV", "PGM", "PBM", "PPM", "BMP", "JPEG", "PNG", "GIF", "OTHER"]
If you find some bugs, plase tell me.