Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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croniter
Parses cron schedule strings and iterates the matching datetime values, with DST, second/year fields, and last-weekday support.
json-schema
A lightweight, historical CommonJS implementation of the original JSON Schema draft specifications
FastMCP
The fast, Pythonic framework for building Model Context Protocol servers, clients, and apps
ExcelJS
Read, manipulate, and write XLSX spreadsheet data, styles, and formulas in JavaScript
jsoniter
A high-performance, 100% compatible drop-in replacement for Go's encoding/json.
openapi-ts
OpenAPI-to-TypeScript code generator producing production-grade SDKs, Zod schemas, and TanStack Query hooks.
structlog
Structured, typed logging for Python built on plain functions and dictionaries instead of a bespoke logging DSL.
JSON-Patch
Lean, high-performance RFC 6902 JSON Patch and JSON Pointer implementation for applying, generating, validating, and observing diffs between JSON documents.
@apidevtools/swagger-parser
Parses, validates, and dereferences Swagger 2.0 and OpenAPI 3.x specs in Node.js and browsers
Echo
A minimalist, high-performance Go web framework with a radix-tree router, built-in middleware chain, and first-class HTTP/2 support.
networkx
Python library for creating, manipulating, and analyzing complex networks and graphs.
prometheus-client
The official Python instrumentation library for exposing Prometheus metrics
Slack SDK for Python
The official Python SDK for building apps, bots, and integrations on the Slack Platform.
JSONPath
A JavaScript library for querying, transforming, and extracting data from JSON documents using an extended JSONPath syntax.
clickhouse-connect
ClickHouse's official high-performance Python driver, with native Pandas, NumPy, PyArrow, and Superset support
sniffio
A tiny Python library that detects which async framework (trio, asyncio, or curio) your code is currently running under.
E2B
Python SDK for spinning up secure, isolated cloud sandboxes where AI agents can safely run code.
PyMuPDF
A high-performance Python library for extracting, rendering, converting, and manipulating PDF and other document formats.
APScheduler
Python task scheduler with cron, interval, and one-off triggers, backed by pluggable persistent datastores for distributed job scheduling.
@e2b/code-interpreter
JavaScript/TypeScript SDK for running AI-generated code in stateful, isolated E2B cloud sandboxes
PEFT
Hugging Face's library of state-of-the-art parameter-efficient fine-tuning methods for large models.
PyO3
Rust bindings for the Python interpreter, for writing native extensions or embedding Python in Rust.
js-beautify
Reformats and re-indents JavaScript, HTML, and CSS into clean, readable code
pyparsing
Build recursive-descent parsers in Python without a separate grammar file
