You can get a code signing certificate from various providers prices vary a lot, but most reputable ones let you sign unlimited EXE/DLL files during the certificate’s validity. There aren’t really free options like with SSL, because code signing requires identity verification. If you just need a straightforward solution without complicated hardware requirements, you can look into providers like
SignMyCode, which offer both individual and company certificates at reasonable rates. Once issued, you can use the same certificate to sign all your programs and installers until it expires. As, I have also been using their Code signing certificate and got at the reasonable price as compare to other providers. Hope it helps!
