The friendly Operating System for the Internet of Things
Here is a list of all modules:
[detail level 123456]
 BoardsBoard specific definitions and implementations
 CPUCPU specific implementations
 DriversDrivers for external devices as radios, sensors, memory etc
 HD44780 LCD driverDriver for the Hitachi HD44780 LCD driver
 KernelThe RIOT micro-kernel containing the core functionality
 Native MTDMtd flash emulation for native
 NetworkingNetworking libraries
 PackagesExternal libraries and applications
 SystemSystem library contains tools and utilities that make RIOT an actual operating system
 UtilitiesUtilities and helper functionality