Currently
15
Rust, a programming language emphasizing performance, type safety, and concurrency
Nix, a declarative package manager emphasizing reproducibility and reliability with a functional language of the same name
Git, a simple, popular distributed version control system created by Linus Torvalds
Python, a high-level, dynamic, interpreted programming language known for its simplicity and readability
Linux , a Unix-Like FOSS operating system (technically a kernel, but popularized as an operating system) which is wayyy better than Mac/Windows :)