I am experimenting with my heavily modded Linux kernel fork at https://gitlab.com/SANELINUX/.
I did written an amazing super program: an authenticator for Unix systems which easily replaces existing ones such as sudo(8) and su(1), and offers much more options to control authentication process. I like to code in C, sometimes in C++, and I like system and embedded programming much.
I also do electricity related activities: I develop SMPS projects, inverters, interested in solar energy utilization and required infrastructure.