ripgrep-all: ripgrep, but also search in PDFs, E-Books, Office documents, zip, tar.gz, etc.
safe - a #[safe] attribute to document why an unsafe block is valid and the constraints it must uphold.
fast_paths - Fast shortest path calculations for Rust.
bstr - A string type for Rust that is not required to be valid UTF-8.
winit - a cross-platform window creation library written in pure Rust.
genact: A nonsense activity generator 
aljabar - Extremely generic linear algebra libary for Rust.
At request of @carols10cents, I suggest that we mention a site Rustexp as CotW for next week.
big_s: Rust's missing String literal
termimad: A library to display rich (Markdown) snippets and texts in a rust terminal application
immense: Meshes with L-Systems
stdg - Standard Graphics is a universal rendering engine abstraction for 2D graphics.
RVirt - RISC-V hypervisor written in Rust.
Snoopy - A highly configurable multi-threaded packet sniffer and parser build in rust-lang.
async: A tool to parallelize shell commands
loopybayesnet: Rust implementation of the Loopy Belief propagation algorithm for inference in Bayesian Networks
mathew: Mathematical expression evaluator with context and float methods
overloadable -- "This crate provides you with the capabilities to overload your functions in a similar style to C# or C++, including support for meta attributes, type parameters and constraints, and visibility modifiers."
rstest : rstest use it to implement fixtures and table based tests. Disclaimer... Is a create of mine.
heim: Cross-platform async library for system information fetching