T-Kernel is an open source real-time operating system (RTOS) designed for 32-bit microcontrollers. It is standardized by T-Engine Forum, which distributed it under T-License agreement. There is also a corresponding Micro T-Kernel (μT-Kernel) implementation designed for embedded systems with 16-bit or 8-bit microcontrollers.
Today, it is distributed by TRON Forum, a successor of T-Engine Forum under T-License 2.2.