At a 24-hour hackathon at Google Cambridge, MA, a team of 3 developers created an gesture-based android wearOS app. We modeled the movement of a 'flick of the wrist' to allow the user to advance slides hands-free during a presentation, without having to reach for a clicker. 1st place.
DIY install of a Nexus 7 android tablet into my old BMW car. Included custom ROM with power-save mode on car off so it could sit for 2-3 weeks without being used and not run out of battery. Since, upgraded further to use android auto over wifi from a paired phone in developer mode.
In 2002 I was part of a community-based group (IrishWAN/DublinWAN) who were trialling building a wirelessness network for the Dublin area, with goals of providing a free and open network for users to collaborate on and as a means to split the high cost (and limited availability) of broadband internet back then. One of the highlights was our first real-world trial of a long distance wifi antenna connection. We were able to get point to point wifi and internet connectivity from the top of the Hill of Howth from a paired antenna in Dun Laoghaire, Dublin - a 6mile wifi connection!