The latest release of spike/neuralog is a compressed tar file. CHANGELOG shows the revision history.
Spike is distributed under the GNU General Public Licence, which is included in this distribution, in the file spike/src/COPYING. This software is distributed WITHOUT ANY WARRANTY.
The file INSTRUCTIONS contains instructions on how to install Spike and Neuralog, and how to get started with a simple example circuit.
brochure.ps is a postscript description of the capabilities of neuralog and spike.
It is assumed that you already have AnaLOG and cview, two components of the Caltech chipmunk tools running on your system, and that you are familiar with their use. Alternatively, you may use some other data viewing program to look at the data besides cview.
Alternately, you can avoid the use of AnaLOG/NeuraLOG altogether by specifying your schematic with a text editor such as emacs or vi.
The PCMP Spike-NeuraLOG archive has hosted the project for over 10 years (with thanks to Tobi Delbrück).