Packages

JavaScript number formatting library for formatting and manipulating numbers with locale support. Formats numbers as currency ($1,234.56), percentages (12.3%), file sizes (1.2GB), and custom patterns. Supports locale-aware formatting and arithmetic operations that avoid JavaScript floating-point issues. Note: package has been mostly unmaintained since 2019.

Comprehensive computer vision and image processing library providing algorithms for feature detection, object recognition, camera calibration, optical flow, and DNN model inference.

OpenCorporates global company data REST API for compliance teams, banks, fintechs, investigative journalists, and due diligence platforms to access corporate registry data from 200+ jurisdictions worldwide — enabling automated KYB verification, beneficial ownership research, company status monitoring, and corporate network analysis through OpenCorporates' open corporate data platform covering 200M+ companies. Enables AI agents to manage company search for corporate entity discovery automation, handle company profile for registered address and director information automation, access filing history for corporate filing and amendment automation, retrieve officer data for director and shareholder information automation, manage reconciliation for company name-to-registry matching automation, handle beneficial ownership for ultimate beneficial owner identification automation, access network analysis for corporate relationship graph automation, retrieve company status for active/dissolved entity monitoring automation, manage bulk data for large-scale company verification automation, and integrate OpenCorporates with KYB, AML, procurement, and due diligence platforms for global corporate data automation.

Production process manager for Node.js applications. PM2 provides process daemonization, automatic restart on crash, cluster mode (multi-core load balancing), log management, startup scripts, and a monitoring dashboard. The most-used Node.js production deployment tool for bare-metal and VM deployments before container/Kubernetes adoption. PM2 still dominates non-containerized Node.js deployments.

Search and filtering library for Ruby on Rails — translates HTTP params into ActiveRecord scopes using predicate-based DSL. Ransack params: `q[name_cont]=foo` (name contains), `q[status_eq]=active` (equals), `q[created_at_gteq]=2024-01-01` (greater-than-or-equal), `q[s]=name+asc` (sort). Controller: `@q = Agent.ransack(params[:q]); @agents = @q.result`. View helpers: `sort_link(@q, :name)` for sortable column headers. Supports associations (q[user_email_cont]), custom ransackers for computed attributes, and form helpers for search form generation. Successor to MetaSearch.

Full-stack Python web framework that compiles to React without writing JavaScript. Reflex uses Python classes to define UI components, state management, and event handlers — compiling to a React frontend with a FastAPI backend. Ideal for data scientists and AI engineers who want to build interactive web applications without learning JavaScript/React. Built-in real-time state sync between frontend and backend. Deploy locally or to Reflex Cloud.

Functional Relational Mapping (FRM) library for Scala — the standard Scala database access layer. Slick maps Scala collections operations (filter, map, flatMap, join) to SQL queries at compile time, providing type-safe database queries without raw SQL strings. Supports PostgreSQL, MySQL, SQLite, H2, and Oracle via JDBC. Key features: type-safe queries via Slick's lifted embedding DSL, async non-blocking database access via Scala Futures, plain SQL support (sql"SELECT..."), and schema code generation from existing databases. Alternative to Doobie (more functional) and Quill (macro-based).

Treasury Prime banking-as-a-service REST API for fintech companies and software platforms to embed banking products (accounts, payments, cards) through a network of FDIC-insured bank partners. Enables AI agents to manage bank account creation and KYC onboarding for embedded banking product automation, handle ACH origination and receipt for payment product automation, access debit card issuance and management for card product automation, retrieve real-time transaction and balance monitoring for account management automation, manage sub-accounts and account hierarchy for financial product structure automation, handle push-to-card for instant disbursement automation, access wire transfer for high-value payment automation, retrieve spend controls and card authorization rules for card program automation, manage bank partner selection and redundancy for multi-bank BaaS resilience automation, and integrate Treasury Prime with lending platforms, marketplaces, and software companies for embedded banking product development.

Low-level C++ LLM inference engine with Python bindings (llama-cpp-python) that runs GGUF-format quantized models locally with fine-grained control over context, sampling, and constrained generation.

Collection of low-level React visualization primitives from Airbnb built on D3. Unlike high-level chart libraries, visx provides the building blocks (scales, shapes, axes, gradients, patterns, interactions) as React components without opinionated chart layouts. Used when you need the power of D3 with the React component model. Powers complex custom visualizations at Airbnb scale.

An MCP server that enables AI models to search Chinese railway (12306) train tickets, query station stops, filter train info, and find multi-leg transfer routes.

Collection of reference implementations showing how to deploy MCP servers on AWS serverless infrastructure (Lambda, ECS) with both stateless and stateful patterns, including AI agent examples using the Strands SDK.

AssemblyAI transcribes audio files with high accuracy and offers LeMUR — an LLM layer over transcripts — for summarization, Q&A, and structured data extraction in one API call.

A compliance-focused reference implementation of a banking API built with ASP.NET Core 10.0. Includes REST API with OpenAPI spec, MCP server for AI integration, JWT/OIDC authentication, rate limiting, and validation against OWASP API Security Top 10, GDPR, and CCPA.

ClickHouse Cloud API — managed ClickHouse columnar database for real-time analytics with sub-second queries on billions of rows, accessible via REST HTTP interface or native protocol.

An open-core, self-improving code search platform that indexes codebases into vector embeddings and exposes semantic search via MCP servers. Uses ONNX embeddings, Qdrant vector DB, Redis cache, and an adaptive reranking system that learns from usage patterns. Provides two MCP endpoints: a memory server and an indexer server.

Remote Docker build acceleration service. Depot replaces `docker build` with `depot build` and runs builds on fast, persistent-cache remote machines with native ARM64 support. Typical result: 10-40x faster Docker builds due to persistent layer caches across builds and team members. Drop-in replacement for Docker BuildKit — no Dockerfile changes required. REST API and GitHub Actions integration for CI pipeline acceleration.

MCP server for connecting video workflows to Dropbox cloud storage. Enables AI agents to organize and access video assets stored in Dropbox — downloading videos, managing video file organization, and integrating Dropbox video storage into AI-driven media processing workflows.

SDK and documentation generator from OpenAPI or Fern's own IDL. Fern generates idiomatic, production-quality SDKs in TypeScript, Python, Java, Go, Ruby, and C# from your API definition. Unlike generic code generators, Fern's output follows language idioms (dataclasses in Python, interfaces in TypeScript) rather than generic scaffolding. Used by Anthropic, ElevenLabs, Cohere, and others for their official SDKs. Also generates interactive API reference documentation.

Google BigQuery serverless data warehouse API — run SQL analytical queries on petabyte-scale datasets with automatic scaling, columnar storage, and ML features built in.