The project that got me into open source and software development was the DMOJ: Modern Online Judge, an online programming contest platform. As a high school student, I benefitted as both an end user practicing my problem solving skills on their hosted contests, as well as my coding skills as a developer, and my leadership skills as the leader of the moderation team.

In addition to that, here are a sample of some of the more memorable projects I have worked on.
The rest can be found on my Github.

DMOJ: Modern Online Judge
Canada's largest online judge, with over 45000 users and 60+ runtimes.
PanMK
Continuous compilation loop for Pandoc, with automatic viewer refresh.
jpendulum
Motion tracking for pendulums by using computer vision to perform fuzzy matching on extracted video frames.
rendezvous
Visualizer for space shuttle/ISS rendezvous.