Download of SCADE 5.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software is an intellectual property of Esterel Technologies.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This PC tool can work with the following extensions: ".vsp", ".etp" and ".vsw". The most popular version among SCADE users is 5.0. The software is included in Development Tools. The program's installer file is commonly found as VCS.EXE.
From the developer:
SCADE System is a model-based, open source system architecture tool for developers of critical systems that is based on the SysML and Eclipse standards. SCADE System has been developed specifically for use on critical systems with high dependability requirements.
You may want to check out more software, such as SCADA/HMI Workstation Screen Saver, SAEAUT SCADA or Circutor PowerStudio Scada, which might be related to SCADE.