MicroBlocks: Live blocks programming for microcontrollers.
@microblocks

MicroBlocks is a free (MPLv2) blocks-programming language for physical computing. What makes MicroBlocks different is its combination of live programming and autonomous operation, also allowing parallelism and portability.

It was conceived as an educational programming language, but its stability and versatility have proven it valid for a wide variety of additional applications, such as hobby domotics, art, live music coding or prototyping.