OpenMLauncher is an open-source Minecraft launcher core written in Java and maintained by GoinDog Studio. Developers can download games, launch games, account control, and other operations by calling the functions of the project. The project is currently licensed under the GPL-3.0 open source license. To learn more, go to GoinDog Developers
If you want to use it, you can go to Releases to download the official version, and the development version and more versions can be downloaded by going to Download OpenMLauncher - GoinDog Developers