AntTweakBar is a small and easy to use C/C++ library that allows programmers to quickly add a light and intuitive GUI into OpenGL or DirectX based programs to interactively tweak parameters on-screen.
AntTweakBar works with Linux, Windows and OSX, and can be easily integrated with custom windowing system or with existing toolkits. Examples of integration with GLFW, SDL, GLUT, SFML and DirectX are provided.
The AntTweakBar library mainly targets graphical applications that need a quick way to tune parameters (even in fullscreen mode) and see the result in real-time like 3D demos, games, prototypes, inline editors, debug facilities of weightier graphical applications, etc.
The project is not maintained anymore but feel free to download and modify the source code to fit your needs or fix issues.
An awesome library to create lightweight GUIs for small scale projects quickly. I've used it for a number of school projects, and it's usually a fairly quick and painless task to get what I need up and running. I've also seen it used a number of times to create editors for student game projects and it was decently capable in those regards too. However, if you're looking to do something on that scale I might recommend using a more fully featured GUI library. For what it is, AntTweakBar does the job quite well.
good job! really good for glut!