MineBuilder!

Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner, Minecraft, and the like.

ROBLOX is an online virtual playground and workshop - where kids of all ages can safely interact, create, have fun, and learn.

Terasology (started under the name Blockmania) is an open source project started by Benjamin “begla” Glatzel to research procedural terrain generation and efficient rendering techniques in Java using the LWJGL. The engine uses a block-based voxel-like approach as seen in Minecraft. After proving itself as a solid tech demo begla was joined at first by Anton “small-jeeper” Kireev and Rasmus “Cervator” Praestholm and a full-fledged game concept was born.

In a galaxy of procedural worlds made entirely from LEGO bricks, will you...

The Fun-Focused Free Software Voxel World Game.

Mythruna is a game under construction combining extensive world building, crafting, and sandbox elements with just a touch of role-playing. When completed, Mythruna will be a unique gaming experience.

Creativerse is a sandbox adventure game set in a beautiful yet treacherous world shrouded in mystery. Adventure solo or bring your friends, unearth secrets, and tame the land together!

Cube World is a 3D action RPG currently in development for PC. It features a huge procedurally generated world made up of cubes!It may look like another Minecraft clone but this is more down to exploration. Find roads leading to a village. Get quests and talk to NPC's. Its inspiration mainly comes off of Legend of Zelda, but open world.

You are marooned on the shores of an infinite blocky world. Explore, mine resources, craft tools and weapons, hunt and make traps. Build a shelter to survive nights and share your worlds online. Possibilities are infinite in this sandbox survival and construction game.

Night is falling and your blockhead is freezing. You haven't yet made shelter and your campfire has gone out. All you have is a spade, some wood and a few sticks. You have only minutes before exhaustion hits. Do you create a bed, dig a cave or refuel your fire?

Play as Wilson, an intrepid Gentleman Scientist who has been trapped by a demon and transported to a mysterious wilderness world. Wilson must learn to exploit his environment and its inhabitants if he ever hopes to escape and find his way back home. Enter a strange and unexplored world full of strange creatures, dangers, and surprises. Gather resources to craft items and structures that match your survival style. Play it your own way as you unravel the mysteries of this strange land.

A completely clean-room implementation of Minecraft beta 1.7.3 (circa September 2011). No decompiled code has been used in the development of this software. This is an implementation - not a clone. TrueCraft is compatible with Minecraft beta 1.7.3 clients and servers.

Stonehearth is a game about exploration and survival in an epic fantasy setting. Your job is to help a small group of settlers survive and carve out a place for themselves in a hostile land. You’ll need to establish a food supply, build shelter, defend your people, and find a way to grow and expand, facing challenges at every step.