Hi all,
Yesterday i added signing for our Windows installer. From now one all our files and the installer will be signed.
You also can make signed installers if have own certificate.
Hey Roman! Did you get a free certificate for open source somewhere? I’d be very interested in this for my own project, too!
No. Susan bought it.
I know about this Open Source Code Signing. It cost €14.00. Maybe this is not big price for you.
Next I will get the Apple Developer ID.
I need to stop having meetings and do some honest work. 
Signing Mac OS X package is even easier.