The license on the Github repository seems much more reasonable:
OpenJDK binaries are released under the GNU GPL v. 2 with classpath exception.
Project icon is taken from Nuvola icon set, it is released under the GNU LGPL v. 2.1.
Build scipts are released under the Apache License 2.0.
Other sources and binaries in this project (cygwin, freetype etc.) are released under their corresponding licenses.
there's also a github repository with openjdk 8 windows builds availabe as zip : https://github.com/ojdkbuild/ojdkbuild