Directory

Open Source Packages

Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.

5929 packages

All Packages

76Health
Library Cargo

quote

The quasi-quoting library that turns Rust syntax into token streams for procedural macros.

1,580
Other
Used by 30
92Health
Framework Cargo

axum

Ergonomic and modular HTTP routing and request-handling framework for Rust, built on Tokio, Hyper, and Tower.

27,128
MIT
Used by 28
92Health
Library PyPI

LiteLLM

Call 100+ LLM APIs from OpenAI to Anthropic to Bedrock through one unified, OpenAI-format Python interface.

58,726
MIT
Used by 26
40Health
Library Cargo

once_cell

Single-assignment cells and lazy statics for Rust, without macros or unsafe code

2,091
Apache 2.0
Used by 26
50Health
Library Cargo

serde_yaml

Strongly typed YAML serialization and deserialization for Rust, built on Serde

1,018
Apache 2.0
Used by 25
94Health
Library Cargo

rustls

A modern, memory-safe TLS library for Rust with no unsafe code and no legacy crypto by default.

7,619
Other
Used by 23
55Health
Library Cargo

Tower

Modular, reusable Rust components for building async network clients and servers

4,294
MIT
Used by 23
79Health
Library Cargo

sysinfo

Cross-platform Rust library for fetching system information — CPU, memory, disks, processes, and networks

2,742
MIT
Used by 22
90Health
Library Cargo

time

Ergonomic, no-std-compatible date and time handling for Rust with parsing, formatting, and macro literals.

1,338
Apache 2.0
Used by 22
98Health
Framework Composer

Laravel

The expressive, elegant PHP framework for building modern web applications

34,910
MIT
Used by 21
93Health
Library Cargo

hyper

A fast, low-level HTTP client and server library for Rust supporting HTTP/1 and HTTP/2

16,316
MIT
Used by 21
89Health
Library Cargo

rusqlite

An ergonomic, safe Rust wrapper around SQLite with typed rows and prepared statement caching.

4,396
MIT
Used by 21
84Health
Library npm

http-proxy-middleware

The one-liner Node.js proxy middleware for connect, express, next.js, hono, and more.

11,126
MIT
Used by 20
70Health
Library PyPI

orjson

A fast, correct, Rust-backed JSON library for Python with native dataclass, datetime, and numpy support

8,228
Apache 2.0
Used by 19
80Health
Library Cargo

image

Rust library for image processing plus encoders/decoders for common image formats

5,869
Other
Used by 19
53Health
Library Cargo

csv

Fast, flexible CSV reading and writing for Rust, with Serde support

1,959
Other
Used by 19
77Health
Library Cargo

http

The shared Rust crate defining Request, Response, and other core HTTP types

1,381
Apache 2.0
Used by 19
96Health
SDK Cargo

vercel_runtime

The official Rust runtime for writing and deploying serverless functions on Vercel.

16,243
Apache 2.0
Used by 18
55Health
Library Composer

Collision

Beautiful command-line error reporting for PHP apps and test suites

4,658
MIT
Used by 18
87Health
Library Cargo

notify

Cross-platform filesystem notification library for Rust

3,453
Other
Used by 18
67Health
Library Cargo

itertools

Extra iterator adaptors, methods, and macros extending Rust's standard Iterator trait

3,169
Apache 2.0
Used by 18
59Health
Library Cargo

Criterion.rs

Statistics-driven microbenchmarking for Rust that reliably detects performance changes.

446
Other
Used by 18
75Health
Library Cargo

SQLx

Async, pure-Rust SQL toolkit with compile-time checked queries and no DSL

17,471
Other
Used by 17
48Health
Library npm

forge

A native, pure-JavaScript implementation of TLS and PKI cryptography for building crypto-based Node.js and browser apps.

5,331
Other
Used by 17

Join founders buildingwith open source

Opinionated takes, migration guides, cost-saving tips, and insights from the open source ecosystem.

Subscribe on Substack
Join 750+ subscribers