This is a line following robot with vaccum cleaning capabilities. This project explains how to build it using Arduino and also NodeMCU.
Bus Tracker using Soracom Cellular Device, AWS, a couple raspberry pi's and Waveshare E-Ink Display
Use Uber without a phone! This AWS IoT connected device allows anyone without a smart phone or different capabilities to request Uber.
Using OpenCV on Raspberry Pi, Check if somebody's in my parking spot! Use the power of the cloud to notify me.
Have Amazon Echo control your Virtual Reality App. Teleportation tool in VR. You can say: Alexa, tell VR Controller to take me to the gym.
Alexa Skill to plan trips with different mode of public transportation and know more about train stations it in UK.