Personal goto's: https://www.slax.org/ https://lubuntu.me/ # official ubuntu https://lubuntu.net/ # not ubuntu's :)

Also usually try these on to see how they work: https://reactos.org/ http://kolibrios.org/en/ # just brilliant! and the OS size is refreshing. just did we allow other OS's to get to GB's big. rah! https://www.haiku-os.org/ # ya, I greatly miss BeOS 5