rust-userspace

Core:

• ninja or samurai (https://github.com/prozum/ronin)
• python (https://github.com/RustPython/RustPython)
• emacs (https://github.com/remacs/remacs)

Compat:

• dash (https://github.com/prozum/rash)
• make (https://github.com/prozum/mare)
• coreutils (https://github.com/uutils/coreutils)

Advance:

• binutils

Nice-to-have:

• patch
• sed
• awk

Purge

• perl
• m4
• automake
• autoconf