SPICE OnlineThe following links contain general information about SPICE and NGSPICE.
General SPICE pages
Berkeley Spice Page
This page has spice3f manuals and information as well as information about nutmeg, an interactive plotting tool that is often used with SPICE.
The Spice3f5 documentation, hosted here at ngspice.com for your convenience.
Free versions of SPICE
Powerful schematic capture and SPICE simulation all from a web browser!
Good version of SPICE for Windows, but some limitations in the free version.
Similar to WinSpice, but for Mac. No limitations on functionality.
NGSPICE at SourceForge
The official development site for NGSPICE.
PDF ngspice manual
NGSPICE files available here for your convenience.
Other circuit related sites
The MOSIS Service
Low cost fabrication of integrated circuits.
Jacob Baker's educational circuit design website