I can't give you particular hints regarding C or Rust, but let me tell you what I can't live without:

* Total Commander - good for handling files / folders, working on remote locations (SFTP, FTP, ...), perfect all-round-tool * Notepad++ - perfect for text editing, also on remote locations, lot of plugins available to cover different needs * Docker - of course, but mainly for developing web apps * iTerm2 - on my Mac I am using this as an SSH-client, this rules out every other SSH client I know and it's free, on Windows I am using MobaXTerm, paid version

For Rust I like VS Code with Rust (RLS) extension