checking extensions that your video card supports

I came across this while doing a web search, OpenGL Ext Viewer 3.16 from realtech VR, has anyone used this, is there something better? recomendations?

It’s free and does the job, what’s not to like?

if you happen to be on a Mac, the Apple developer tools include an app called “OpenGL Driver Monitor” that can show video card capabilities, but I wouldn’t say it’s better for that purpose than the RealTech tool.

very useful, nice find!