Download

Currently Windows® executables are available only, but with Wine, they also run on other operating systems. No installation is needed. Decompressing the archive file creates the directory uSimmics. It is started by executing  uSimmics/bin/uSimmics.exe.
The application was tested without any problems on Windows® XP, 7, 8, 10 and 11.

The latest version with the new name:
download uSimmics-5.8.zip (47 MByte)

Previous versions with the old name:
download QucsStudio-4.3.1.zip (50 MByte)
download QucsStudio-3.3.3-light.zip (9.5 MByte) for converting (= open and save) old schematic files

Sources

The source code of ICARUS, GHDL, KiCAD, MinGW and Octave can be downloaded from the official homepages. QucsStudio uses the unchanged binaries.

ADMS (VerilogA converter from the ADMS project)
It.e.cad (schematic capture & PCB layout from iteco)
QucsConv (file format converter)
QucsFilter (filter synthesis tool)
technical documentation (circuit simulation, models etc.)

See README and COPYING files for details.