The latest SPICE-IBIS version is 3 (s2ibis3) and is available through the IBIS Open Forum (the industry group which manages the IBIS and ICM specifications) and through the spice2ibis author, Ambrish Varma, at NC State University.
You can find the s2ibis3 beta version at:
**broken link removed**
Please note that the page will soon be updated to include the final, post-beta code, as announced in the IBIS Open Forum teleconference on Feb. 18, 2005.
You can find all the currently available free IBIS tools through the IBIS Open Forum website: