Crates that seem useful to me. Plus links to useful tutorials and stuff. Very personal, probably not useful to anyone else.
https://crates.io/crates/dashmap
A concurrent hashmap. Focus on speed.
https://crates.io/crates/staticvec
Implements a fixed-capacity stack-allocated Vec alternative backed by an array. Supports const. Also has static string support.
https://docs.rs/generic-array/0.13.2/generic_array/
This crate implements a structure that can be used as a generic array type [T; N], where N is an int type.
Good for when you want a generalized struct whose size can be defined at compile time. Particularly useful if you want the array to be part of the struct.
https://docs.rs/typenum/1.11.2/typenum/index.html
This crate allows you to make numbers part of a type. Super useful for generic programming.
https://crates.io/crates/sysinfo
Useful for getting system level info (e.g. number of disks, network info, etc). Cross platform.
Elm like front end that compiles to Webassembly. One of the more mature options.
https://docs.rs/luminance/0.38.0/luminance/
Easily the best choice for a creative 3D framework. Great tutorial, written by experienced demoer with a Haskell background. Plus fun.
https://github.com/apessino/modulator
Modulators are sources of change over time which exist independently of the parameters they affect, their destinations.
The architecture presented here was inspired, in part, by the world of audio synthesis, so let us introduce the main concepts by drawing a parallel to it.
https://github.com/Razaekel/noise-rs
A procedural noise generation library for Rust.
Most of the good stuff is here.
Simple game engine http://ggez.rs/
https://github.com/amethyst/amethyst/tree/master/examples/renderable
https://github.com/bzar/sfxr-rs Procedural sound effects
Safe Lua scripting.
https://github.com/RustAudio/lewton
https://github.com/jeremyletang/rust-sfml
https://docs.rs/itertools/0.7.11/itertools/
https://docs.rs/rand/0.6.1/rand/
https://docs.rs/clap/2.32.0/clap/
Working with images (not drawing, but standard decoding/encoding/colorspace/etc).
https://github.com/RazrFalcon/resvg
lazy_static, log, rand, num, smallvec, serde (+json +yaml), strum, rental, regex, backtrace, itertools, error-chain, sdl2, gl, png, ogg-sys, vorbis-sys, vorbisfile-sys, twox-hash, rlua