The academic spinoffs of SPICE include XSPICE, developed at Georgia Tech, which added mixed analog/digital "code models" for behavioral simulation, and Cider (previously CODECS, from UC Berkeley/Oregon State Univ.
Академические версии программы: XSPICE (Georgia Tech, с поддержкой смешанных аналого-цифровых моделей) и Cider (ранее CODECS, UC Berkeley и Oregon State Univ.