I remember Metro-X. It supported several video cards Xfree86 didn't support back then so if you wanted to use newer video cards you had to "acquire" a copy of M

I remember Metro-X. It supported several video cards Xfree86 didn't support back then so if you wanted to use newer video cards you had to "acquire" a copy of Metro-X. What's weird it wasn't the only proprietary software commonly used back then. Before drivers for Sound Blaster 16 cards were mainlined in the 2.x kernel we had to use Open Sound System which was commercial software made by this company called 4Front that had a free version.