KiCAD a free and open source EDA tool was designed and written by Jean-Pierre Charras, a researcher at "Laboratoire des Images et des Signaux".
The EDA tools are usually under commercial licenses and very expensive. That increases the investment of electronics engineering and brings many other issues. One of my friends used the hacked EDA tools for his projects. Unfortunately, one of the tools was infected by CIH virus and all of his projects on the hard disk were in vain on that big day. It is important to get free (or low cost) EDA tools for electronics engineering.