talking about C++, there are drogon framework: https://github.com/drogonframework/drogon https://github.com/drogonframework/drogon not bells and whistles like

talking about C++, there are drogon framework: https://github.com/drogonframework/drogon https://github.com/drogonframework/drogon not bells and whistles like on Wt as there are no integrated widgets. But have c++ based template (for HTML) engine and other integrated parts what you expect from framework (routing, controllers, db, authentication handling and so on). and boasts high performance design