Best open-source Cargo add-ons and Rust build tools (2026)

A Rust linter with over 800 lints that catches common mistakes and suggests more idiomatic code, run as a cargo subcommand.

Rust's official package manager, which downloads project dependencies and compiles Rust code.

An interactive terminal UI for browsing a Rust project's dependency graph as a navigable tree, run via cargo tree-tui.

A drop-in cargo front end that makes incremental Rust rebuilds take milliseconds by JIT-compiling only changed functions into the running program.

A background code checker for Rust that runs cargo check, clippy, and tests on save and shows warnings and errors in a terminal UI.

A Rust-based flamegraph generator that profiles Cargo projects or any binary using perf, xctrace, or dtrace/blondie, without Perl.