Edddy
Thee Block-based Map Editor
Lil' Bitty Things
a tiny 3d game engine
Piecewise
Assemble multi-platform chat bots using puzzle-like blocks
Kovel
An easy to use voxel editor
Block Construct
3D procedural generator using Wave Function Collapse (WFC)
BlockHTML
Code websites with no knowledge required.
ManaWarg
Protean World Creator
Big Block Engine
2D block-based mod-friendly sandbox game/game engine