Currently working on textbooks in:

Topological Manifolds (Lee: Topological Manifolds)

Abstract Algebra (Dummit and Foote)

Geometric Algebra (Doran: Geometric Algebra for Physicists)

Differential Geometry (Fecko: Differential Geometry and Lie Groups for Physicists)

Though I'm less invested in these last two currently, as the diff geo's a prep for the masters I'll be doing and the other is something I'd really like to pursue but can't motivate myself to start working the problems out on.

I play around with some tech stuff, but nothing major -- just doing FreeCodeCamp and trying to keep my Python skills from going too rusty.

I'm fixing to start an Applied Mathematics and Theoretical Physics masters, so might review QM and CM as well as it's been a while since I've done them in school and I need a refresher, even if I hope to lean towards the 'Applied Math' (which is mostly numerical algorithms related, etc.) side of things in the masters.

Otherwise, I've been continuing working with Irish (Gaelic), and keep dabbling in some other languages, ranging from Spanish to Latin to Japanese. I also try to read widely in various topics from religious studies, philosophy to linguistics, psychology (I know...), sociology, pop science, etc. I've also bought an ocarina I need to try to practice since I'm off for the summer and don't have to worry about disturbing my roommate. But this is all mostly dabbling at this point, as I'm fixing to move countries for (at least) a year, so...