Mineclonia is a fork of VoxeLibre (formerly MineClone2) that adds various improvements:

Differences from MineClone 2

• Overworld depth increased from 64 to 128 nodes
• Improved nether portals
• Improved leaf decay
• Improved villages
• Wandering traders and trader llamas
• Suspicious nodes, pottery sherds and decorated pots
• Conduits
• Deep dark biome and ancient hermitage (structure corresponding to ancient city)
• Functional loom to apply banner patterns
• Lush caves biome
• Cherry grove biome
• No in-game music, twice as small compared to VoxeLibre (formerly MineClone2)
• No hamburgers (but villagers follow dropped food as in Minecraft)
• No renamed mobs (e.g. Creepers remain Creepers, not Stalkers)
• Overhauled mob pathfinding, physics, and AI
• Custom Lua map generator featuring terrain and biomes that closely comport to Minecraft and which is compatible with Minecraft seeds

Mineclonia has like 95% of the features of Minecraft but is way better because you don’t need a Microsoft account, plus modding is easier.

Also awesome:

• Pingus - Puzzle game with mechanics similar to Lemmings
• Dr. Robotnik’s Ring Racers - Kart racing game based on Sonic Robo Blast 2 (SRB2), itself based on a modified version of Doom Legacy
• The Powder Toy - 2D physics sandbox game