Eric Green, one of the co-authors of ICE BBS, has licensed ICE BBS v1.1 under the GNU General Public License (GPL). This is effectively the same as releasing it to the Public Domain; it just means that you can't put your own copyright on it, basically. I scanned in all 122 pages of the original printed manual. Now, the manual and d64 disk images of both sides of the original disk are available for download here.
ICE BBS is an ASCII-only BBS program, inspired by an early version of C-Net, and it's what Cottonwood II is currently running on. I feel that it's a very well-written program, and deserved preservation. Enjoy.