Roblox - Reimagining the way people come together.
Blockland - Blockland is a non-competitive multiplayer sandbox-style construction game. It's kind of like playing with legos on the internet.
Lunacraft - Lunacraft focuses on Endless Creativity and Exploration elements.
NERF Arena Blast - The website linked is not real page, just moddb page.
Blocksworld Wool - Download mods for Blocksworld!
SurvivalCraft - SurvivalCraft is a mobile action and adventure game that is based on the wildly popular Minecraft platform.