json_typegen: Tools and libraries to create Rust structs from JSON samples. It was inspired by and uses the same kind of inference algorithm as F# Data.
1 Like
chic: Pretty parser error reporting.
If you are currently writing a parser, this crate can come in handy. 
4 Likes
simple-soft-float:
Soft-float library that intends to be a straightforward reference implementation of IEEE 754.
2 Likes
function_group: A function overloading macro in rust
1 Like
lopdf: A Rust library for PDF document manipulation
1 Like
bstr: A string type for Rust that is not required to be valid UTF-8
7 Likes
cargo-scout: A tool to run clippy and just emit warnings on the (git) diff of your crate. See also:
4 Likes
I'll self-nominate the time crate, which recently had a 0.2 release.
2 Likes
attohttpc: HTTP client, light-weight sync alternative to reqwest, reviewed favourably in Lightweight alternative for `reqwest`? - #19 by dpc. Porting from reqwest to attohttpc reduced binary size & compilation times of bin crate to about half: Replace reqwest by attohttpc to reduce cargo bloat · strohel/goout-calendar@fa44937 · GitHub
4 Likes
I nominate UniCase, the easiest and cleanest way to impliment case insensitivity.
sqlx: The Rust SQL Toolkit.
SQLx is a modern SQL client built from the ground up for Rust, in Rust.
- Truly Asynchronous . Built from the ground-up using async-std using async streams for maximum concurrency.
- Type-safe SQL (if you want it) without DSLs. Use the
query!()macro to check your SQL and bind parameters at compile time. (You can still use dynamic SQL queries if you like.)- Pure Rust . The Postgres and MySQL/MariaDB drivers are written in pure Rust using zero unsafe code.
10 Likes
That looks amazing, I hope there'll soon be a SQLlite equivalent, so far anything SQLlite has unsafe 
1 Like
Seen here (Traits to impl to mimic `Rc`? - #2 by CAD97), thanks to them as I hadn't heard of it before
7 Likes
I haven't heard of shrinkwraprs either. Thanks, @drmason13, for the suggestion 
. That crate looks really useful. 
1 Like
cxx: Safe interop between Rust and C++
17 Likes
redshirt - an OS prototype where binaries are WASM, run in ring 0.
12 Likes
dashmap - Blazing fast concurrent HashMap in Rust.
4 Likes
fasteval - Fast and safe evaluation of algebraic expressions.
6 Likes
mqtt-async-client - An MQTT 3.1.1 client written in Rust, using async functions and tokio.
I'd like to nominate cargo-husky - a pre-commit tool that has zero setup costs - just check out a repo that uses it. (tl/dr: It's a dev-dependency crate that has a build.rs that sets up git pre-commit hooks if they're not already there.) - it's already saved me a bunch of time!
7 Likes