I use a Fnatic MiniStreak mechanical keyboard. Somewhat cheaper than the top end brands, but still very good. There is software if you want to configure LEDs and macros and such (it's gamer gear, so it's bedecked in coloured lights), but you don't have to install it.

Mind you, that's true of most Logitech gear too - it'll work fine with basic Windows drivers, you don't have to install that G Hub Pro whatever-it-is stuff.

Some of their mice also have on-board memory for settings - you can configure them once using the software, write the config to the mouse, then not bother with the software again.