Robotics
Solutions for energy
Image processing solutions (Social projects for the visually impaired)
Wireless communication solutions
WiFi solutions ( WiFi provider)
Messaging apps
Video calling / audio calling
Processors such as arudino can be used to create electronic instruments
Networking
VLSI for solar panel solutions
Ultrasonic wireless charging
IoT
Smart rooms / home automation
Smart gardens
Smart aquariums
Smart farms
Alerts for smart security
Neural networks and GPRS Solutions
These are only a few of the many possibilities I was able brainstorm. There are many opportunities that can be discovered. All the best!