WinResizer is a project mainly written in C#, it's free.
Add full-screen windowed mode to any game! Window resizer.
Language: C#
This application will prompt you to select a window (usually a game) and allow you to do the following:
Requirements:
Note: It does not work for all games. I've only tested it on a handful of games myself since this is a personal project. However, if you would like it to work for a certain game, feel free to add a new issue to the project.
Games Tested: