Gnucap, the GNU circuit analysis package, is a flexible mixed-signal circuit simulator with significant technical advantages over SPICE derivatives. One is modularity. Gnucap implements a dynamic loader for extesions adding language support or component models.

Recently, some of the extensions for an experimental fork have been adapted to the the main line. An overview over the development progress and available functionality will be provided. This talk will demonstrate the use of geda schematics and verilog device models in Gnucap driven circuit simulations.