The cognitive load can be used to assess if someone is struggling while performing a task. It can be used in many different situations such as in driving, piloting, studying, playing, working, etc. This information can help to design better systems and even to create interactive systems that can be aware of the user's cognitive load and adapt itself to the user. We propose an open source platform that can be used for doing research about cognitive load in virtual reality (VR). Our platform can be used for stimulating cognitive load through several VR scenes and for analyzing cognitive load through objective and subjective measurements.