Here is what I spend my time on, it's a mix of products, personal projects and open source stuff.
Project Hedra is an ambitious open-world, low-poly RPG released on Steam. I built the game and the engine from scratch using OpenGL as the graphics API and BulletPhysics for the physics.
C++ raytracer that supports custom models. Supports running the calculations on the CPU using C++11 threads or in the GPU via CUDA.
Academic web application that showcases different iso-surface extraction techniques on different implicit volumes.
procedural retro 3d game, winner of the GitHub Gameoff 2017.
implementation of several graph algorithms (dijkstra, prim, pagerank, bfs, etc) using airport & flights data.
example programs written in intel x86 assembly