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

47Health
Library npm

node-xml2js

XML-to-JavaScript-object parser and builder for Node.js

4,962
MIT
Used by 19
93Health
Framework Go

urfave/cli

A declarative, dependency-free Go package for building fast, friendly command-line tools.

24,235
MIT
Used by 17
91Health
Library PyPI

Celery

Distributed task queue for running asynchronous jobs, scheduled work, and complex workflows across Python applications at scale.

28,883
BSD 3
Used by 16
48Health
Library npm

swagger-ui-express

Serves interactive Swagger UI API documentation directly from your Express app based on a Swagger/OpenAPI JSON or YAML document.

1,495
MIT
Used by 16
68Health
Library Go

zerolog

A zero-allocation, chaining-API JSON logger for Go built for both structured production output and pretty local development logs.

12,505
MIT
Used by 15
44Health
Library npm

electron-store

Simple, encrypted JSON persistence for your Electron app — save user settings, window state, and cache across the main and renderer processes.

5,019
MIT
Used by 15
39Health
Library npm

json-schema

A lightweight, historical CommonJS implementation of the original JSON Schema draft specifications

529
Other
Used by 15
51Health
Library npm

ExcelJS

Read, manipulate, and write XLSX spreadsheet data, styles, and formulas in JavaScript

15,469
MIT
Used by 14
46Health
Library Go

jsoniter

A high-performance, 100% compatible drop-in replacement for Go's encoding/json.

13,867
MIT
Used by 14
85Health
Tool npm

openapi-ts

OpenAPI-to-TypeScript code generator producing production-grade SDKs, Zod schemas, and TanStack Query hooks.

5,406
MIT
Used by 14
51Health
Library npm

JSON-Patch

Lean, high-performance RFC 6902 JSON Patch and JSON Pointer implementation for applying, generating, validating, and observing diffs between JSON documents.

1,982
MIT
Used by 14
60Health
Library npm

@apidevtools/swagger-parser

Parses, validates, and dereferences Swagger 2.0 and OpenAPI 3.x specs in Node.js and browsers

1,207
MIT
Used by 14
71Health
Library npm

JSONPath

A JavaScript library for querying, transforming, and extracting data from JSON documents using an extended JSONPath syntax.

1,158
MIT
Used by 13
42Health
Library npm

GSAP

The industry-standard JavaScript animation library for tweening CSS, SVG, canvas, and UI with rock-solid cross-browser reliability.

28,405
Other
Used by 11
95Health
Library npm

@rjsf/core

The React engine that turns a JSON Schema into a fully working form

15,896
Apache 2.0
Used by 10
42Health
Library Go

sjson

A fast, dependency-light Go library for setting and deleting values in JSON documents by dot-path, without full unmarshaling.

2,737
MIT
Used by 10
58Health
Library npm

conf

Simple, schema-validated config file persistence for Node.js apps and CLI tools

1,346
MIT
Used by 10
86Health
Library Cargo

serde_with

Custom de/serialization helpers for Rust's serde, via the with and serde_as annotations

855
Apache 2.0
Used by 10
75Health
Library PyPI

feedparser

Parses RSS, Atom, RDF, CDF, and JSON feeds into one normalized Python dictionary.

2,421
Other
Used by 9
31Health
Library npm

Partial JSON

Parses incomplete JSON strings streamed token-by-token from an LLM into usable JavaScript values as they arrive.

244
MIT
Used by 9
87Health
Tool PyPI

isort

Automatically sorts and organizes Python import statements

6,951
MIT
Used by 8
84Health
Library PyPI

json_repair

Repair malformed JSON from LLMs, APIs, logs, and user input — a drop-in fallback for json.loads().

5,096
MIT
Used by 8
77Health
Library PyPI

Markdown

The reference Python implementation of John Gruber's Markdown, with a pluggable extension system for converting text to HTML.

4,246
BSD 3
Used by 8
89Health
Library PyPI

msgspec

A fast, zero-cost serialization and validation library for JSON, MessagePack, YAML, and TOML in Python.

4,105
BSD 3
Used by 8

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