Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.
I would use the native API for each platform with something like bgfx.
OpenGL 4.6 on Metal
There is also OpenGL 4.6 on Metal
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A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android.
Another option if perf isn't a big concern is to try using Google's angle OpenGL ES 3.0 implementation, there's backends for it to be supported on Vulkan, Direct3D 11, and (work in progress) Metal. Disclosure, haven't tried it myself, just looking at their feature descriptions: https://github.com/google/angle
So Anet's unannounced project is a new MMO? The wording here is quite a bit more specific than on other job postings.
1 project | reddit.com/r/Guildwars2 | 2 Dec 2022
SDL2 or GLFW?
1 project | reddit.com/r/gamedev | 24 Nov 2022
How is Vulkan supposed to supersede OpenGL in practice?
3 projects | reddit.com/r/vulkan | 7 Nov 2022
Are there any game engines or game frameworks that are simple to use and well documented? Anything with c++, python, kotlin, or java support will work. 2d is a must - have.
1 project | reddit.com/r/GameDevelopment | 10 May 2022
Feasibility of a GTK <-> Qt 'transpiler'?
1 project | reddit.com/r/cpp | 18 Apr 2022