OpenGL
Cross-platform API for rendering 2D and 3D graphics.
Debug
AMD's tool suite that includes debugger, profiler and frame/shader analysis.
OpenGL function call interceptor for Windows.
RenderDoc is a stand-alone graphics debugging tool.
A real time remote telemetry frame profiler for games and other applications.
OpenGL capture and playback debugger developed by Valve.
GLSL Editors
Online GLSL Editors
Libraries
Portable library to import 3D models in a uniform manner.
It is a 2D/3D graphics engine for modern OpenGL.
Lightweight portable rapid development library for managing OpenGL display / interaction and abstracting video input.
OpenGL graphics engine for data visualization, especially of numerical simulations.
A simple and easy-to-use library to enjoy videogames programming.
Profile Loaders
Simple OpenGL core profile loader.
Multi profile loader-generator based on the official specs.
Command line tool to generate C bindings for OpenGL, wgl, and glX.
Profile loader leveraging C++11 features to provide type safety.