What is a convenient offline tool on Windows to create a document from a template?

Question

Windows

Good day, tell me a convenient offline tool on windows to create a document from a template.
Interesting features:
Adding variables;
Processing variables (Amount in words, formatting full name, declension of variables by cases;
Inserting conditions (Simple if / else constructions);
Inserting pictures.
Currently available:
Blitz document (Good for everyone, but linking a license to hardware is scary);
Auto doc 2.5 ( I don't like it, there is no processing of variables, there are no conditions.)
Please suggest some analogue of "document blitz", thanks!