The Rust Ecosystem

Categorization of (more or less) widely used crates in the Rust ecosystem.

Category	Crates
error handling	thiserror, anyhow
testing	assert_matches, insta, tokio-test, tracing-test, rstest, test-case
mocking	wiremock, mockito, mockall
code coverage	cargo-tarpaulin, cargo-llvm-cov
performance	cargo-flamegraph, inferno, criterion
logging	log, fern, log4rs
tracing	tracing, tracing-subscriber, tracing-appender, tracing-test
metrics	metrics, prometheus, opentelemetry, tracing-opentelemetry, opentelemetry-datadog, statsd, cadence
decimal/rational numbers	rust_decimal, num-rational
time	std::time, time, chrono
email	lettre, rusoto_ses, rusoto_credential
serialization/deserialization	serde, serde_json, serde_path_to_error, serde_yaml, rkyv
encoding/decoding	base64
mime type (media type)	infer
parsing	csv, plist
xml	xml-rs, quick-xml, xmlparser, roxmltree, xot
encryption	ring, rustls
authentication, JWT	jsonwebtoken
futures	futures::future::Future, futures::future::FutureExt
streams	futures::stream::Stream, futures::stream::StreamExt, async_std::stream::Stream, tokio-stream, tokio_stream::StreamExt, std::async_iter::AsyncIterator
channels	std::sync::mpsc, crossbeam::channel futures::channel::oneshot, tokio::sync::mpsc, tokio::sync::oneshot, tokio::sync::broadcast, tokio::sync::watch, async_channel::unbounded, async_channel::bounded, oneshot
async runtime	tokio
concurrency	dashmap
parallelism	rayon, parallel-stream
HTTP client	reqwest, ureq, isahc
HTTP server	actix-web, hyper, tower, axum, rocket, tide
gRPC	tonic, prost, prost-types, prost-reflect, protobuf, protobuf-parse
websockets	tungstenite, tokio-tungstenite, actix-web-actors
message queue	celery, message-io
database, SQL	postgres, tokio-postgres, sqlx, connectorx
database, ORM	diesel
pool	deadpool
data processing	arrow, arrow2, polars
inversion of control	inject
CLI	clap, structopt, quicli, ergo, termcolor, concolor-control, crossterm
scripting	cargo-script, dyon, rustscript, ion, runner, mlua, rhai
GUI	egui, edom, tauri, druid, iced, kas, dioxus, yew, leptos, slint
embedded	cortex-m, cortex-m-rt, cortex-m-semihosting
wasm	wasm-bindgen, wasm-bindgen-cli
compiler	ferrocene
l10n, i18n	rocket_i18n