VoxeLibre (formerly MineClone2)
content.minetest.net
Survive, farm, build, explore, play with friends, and do much more. Inspired by Minecraft, pushing beyond.

this is basically what a lot of people seem to expect base minetest to be, a reasonably fleshed out MC alternative.

to play, setup minetest 5.3.0 or later and install via content > browse online content.