These are the image files for the docs target.
Check that the md5sum of the file you downloaded matches the md5sum below.
Shortened image file names below have the same prefix:
|Image for your Device||md5sum||File Size||Date|
|openwrt.css||-||9.4 KB||Sun Aug 2 13:31:07 2009|
|openwrt.html||-||248.5 KB||Sun Aug 2 13:31:07 2009|
|openwrt.pdf||-||220.1 KB||Sun Aug 2 13:31:07 2009|
These are supplementary resources for the docs target. They include build tools, the imagebuilder, md5sum, GPG signature file, and other useful files.