Open Source Libraries
Discover 310 open source Library repositories from GitHub, each with an analysis of what it does, key features, use cases and alternatives. Library projects here are most often combined with Python, Developer Tools and TypeScript. Last updated October 5, 2026.
310 repositories · updated October 5, 2026
numba: Compile Numerical Python to Machine Code
Numba compiles numerically focused Python functions to machine code using LLVM, with support for many NumPy operations. It suits Python developers who need faster numerical workloads, loop parallelization, or GPU code generation without rewriting everything in a lower-level language.
python-fire: Turn Python Objects into Command-Line Interfaces
Python Fire generates command-line interfaces from Python functions, classes, modules, and other objects. It suits developers who want to expose existing code as a CLI with minimal setup, or explore and debug code from the terminal.
stepperize: Build Type-Safe Multi-Step React Workflows
Stepperize is a TypeScript toolkit for building multi-step experiences in React, such as wizards, forms, and onboarding flows. It provides typed step definitions and navigation while leaving the interface under your control.
gptpdf: Convert PDFs into Markdown with Vision Models
gptpdf turns PDF pages into Markdown using a vision-capable model, aiming to preserve layouts such as tables, formulas, and figures. It suits developers who need an API-based PDF parsing component and can provide access to a compatible model.
hypothesis: Find Bugs with Property-Based Testing
Hypothesis is a Python testing library that generates inputs for properties your code should satisfy. Use it to explore edge cases that example-based tests may miss and to get simplified failing cases when a bug is found.
python-ftfy: Repair Mojibake and Unicode Text
ftfy is a Python library that repairs mojibake and other common Unicode glitches in text. It suits developers cleaning text from mixed or unreliable sources, with conservative fixes designed to avoid changing text that is already valid.
coraza: Add a Go Web Application Firewall to Your Stack
Coraza is a Go library for building web application firewalls that process ModSecurity-compatible SecLang rules. It supports OWASP Core Rule Set v4 and can be embedded in Go applications or used through server integrations.
hyperpb-go: Parse Protobuf Messages Faster in Go
hyperpb-go is a Go library for fast, read-only parsing of dynamic Protobuf messages. It targets services that load schemas at runtime and need efficient reflection-based processing, with trade-offs including an experimental API and support limited to amd64 and arm64.
zen: Run Business Rules Across Languages
ZEN is a Rust-based business rules engine that evaluates portable JSON decisions consistently across multiple programming languages. Use it to make complex business logic readable, testable, and reusable across services and applications.
editly: Create Videos from Code and Media Clips
Editly is a Node.js command-line tool and JavaScript API for assembling videos from clips, images, titles, and audio. It suits creators and developers who want repeatable edits defined in code, with transitions and overlays rendered through ffmpeg.
virtualenv: Create Isolated Python Environments
virtualenv creates isolated Python environments so projects can manage dependencies separately. It is useful for developers and teams that need reproducible project setups or want to avoid conflicts between installed packages.
harmony: Render and Parse OpenAI Harmony Conversations
OpenAI Harmony is a Rust-based library with Python bindings for rendering and parsing the conversation format used by gpt-oss. It is useful for developers building inference systems that need to handle Harmony messages, channels, and tool calls directly.