Thriot stands for THings that are RIOTing which means that Thriot is an open source IoT Platform with Client libraries for such things that are rioting against being stupid and want to get connected to Thriot to become smart, record telemetry data and collaborate with other things.
Read carefully the Basic Concepts page to get accustomed with Thriot. The high-level architecture can be essential if you want to understand to runtime environment and what components Thiot has. On the walkthrough page you will get to know the basic user flows you can do on the Central website of thriot.
The Demo environment page contains an up-and-running environment deployed to Azure.