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

84Health
Library PyPI

cryptography

The standard cryptographic library for Python, pairing safe high-level recipes with low-level primitives backed by Rust and OpenSSL.

7,786
Other
Used by 54
86Health
Library PyPI

PyJWT

A Python implementation of RFC 7519 for encoding, decoding, and verifying JSON Web Tokens.

5,706
MIT
Used by 44
75Health
Library PyPI

bcrypt (Python)

A Python library for secure password hashing using the bcrypt algorithm with an adjustable work factor

1,501
Apache 2.0
Used by 16
46Health
Library PyPI

itsdangerous

A small Python toolkit for cryptographically signing data so you can trust it hasn't been tampered with when it comes back from an untrusted client.

3,135
BSD 3
Used by 15
67Health
Library PyPI

argon2-cffi

Secure, high-level password hashing for Python using Argon2

731
MIT
Used by 8
40Health
Library npm

react-native-get-random-values

A native polyfill that implements crypto.getRandomValues() for React Native so libraries like uuid work without modification.

415
MIT
Used by 8
69Health
Library PyPI

pyOpenSSL

A Python wrapper around the OpenSSL library for TLS connections and certificate handling

944
Apache 2.0
Used by 6
53Health
Library PyPI

PyOTP

Python library for generating and verifying TOTP/HOTP one-time passwords for 2FA

3,339
MIT
Used by 5
66Health
Library PyPI

pycryptodome

A self-contained, low-level Python library of cryptographic primitives — ciphers, hashes, MACs, and public-key algorithms — with no OpenSSL dependency.

3,265
Other
Used by 4
71Health
Library Composer

Google2FA

A framework-agnostic PHP implementation of HOTP and TOTP one-time passwords, compatible with Google Authenticator and similar apps.

2,010
MIT
Used by 4
53Health
SDK PyPI

hvac

Python client library for HashiCorp Vault's secrets, authentication, and system-backend REST APIs.

1,318
Apache 2.0
Used by 4
61Health
Library PyPI

service-identity

Verifies that a pyOpenSSL or cryptography TLS certificate is genuinely valid for the hostname, IP, or SRV name you intended to connect to.

106
MIT
Used by 4
95Health
Tool Go

cert-manager

Automates issuing, renewing, and managing TLS certificates for Kubernetes clusters.

14,090
Apache 2.0
Used by 3
36Health
Library PyPI

python-rsa

Pure-Python RSA library for key generation, PKCS#1 encryption, decryption, signing, and verification, with no C extensions required.

490
Apache 2.0
Used by 3
80Health
Library PyPI

xxhash

Fast Python bindings for the xxHash non-cryptographic hashing algorithm

467
Other
Used by 3
69Health
Library PyPI

asn1crypto

A fast, pure Python library for parsing and serializing ASN.1 structures with a pythonic, high-performance API.

362
MIT
Used by 3
91Health
Tool PyPI

Certbot

EFF's command-line tool to obtain and auto-renew free Let's Encrypt TLS certificates

33,251
Apache 2.0
Used by 2
89Health
Library Composer

lcobucci/jwt

A simple, RFC 7519-compliant PHP library for creating, signing, and validating JSON Web Tokens

7,478
BSD 3
Used by 2
64Health
Library PyPI

PyNaCl

Python bindings to libsodium for authenticated encryption, digital signatures, hashing, and password-based key derivation

1,206
Apache 2.0
Used by 2
49Health
Library PyPI

python-gnupg

A Python API for GnuPG — generate keys, encrypt, decrypt, sign, and verify data from your code.

143
Other
Used by 2
46Health
SDK npm

@octokit/webhooks-methods

Sign and verify GitHub webhook payload signatures with constant-time HMAC comparison, in Node.js and the browser.

27
MIT
Used by 2
60Health
SDK PyPI

Aliyun Python SDK KMS

Alibaba Cloud Key Management Service (KMS) client for Python.

1,045
Apache 2.0
Used by 1
80Health
SDK Cargo

Nostr SDK

A full-featured Rust SDK for building high-performance clients and in-process relays on the Nostr protocol

674
MIT
Used by 1
42Health
Library Cargo

biscuit

A typed Rust library for JWT, JWS, and JWE - full JOSE token signing, encryption, and validation built on ring.

188
MIT
Used by 1

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