C/C++/Rust/Java - GUI Applications and tools (using EGUI/ImGUI/GTK/Raylib, java.awt, javax.swing)
For Windows, Linux (can also do WASM (Web), but not for all frameworks)
Can also do console applications (Using Clap/Bash/Manually)
Version control - Git/GitHub
I can also use some other libraries from GitHub, but I might need time to learn them.
Can also use C#, but I have small experience with it.
IDEs - VSCode, Visual Studio, NetBeans, Intellij IDEA, Notepad++ and I can adopt to (almost) any other.