Arduino Project Hub
https://create.arduino.cc/projecthub
Sparkfun Learning
https://learn.sparkfun.com/resources
Instructables-Arduino Projects
https://www.instructables.com/Arduino-Projects/
Adafruit Learning System-Projects
https://learn.adafruit.com/category/projects
Wearables Projects from Becky Stern
https://makezine.com/article/technology/arduino/10-fabulous-and-fashionable-wearable-projects-from-becky-stern/
Internet of Things(IOT) Projects
https://sites.google.com/aceraschool.org/mrjonathansengineering/arduino-create-iot?authuser=0