Tools

I once made a tank mesh in text editor

Performance / Debug

Here are tools to debug graphic API's. Year list when the latest version was released.

Shader development

SHADERed - 2019 - HLSL/GLSL

RenderMonkey - 2008 - DirectX9/OpenGL 2.0

FX Composer - 2008 - DirectX9/10 and OpenGL.

3D Viewers

FBX Review

Blender

2D Viewers

ImageMagick

Top Game Graphics and Rendering Tools in 2018

Radeon GPU Profiler

https://gpuopen.com/rgp/

RGP documentation

https://radeon-gpuprofiler.readthedocs.io/en/latest/