:hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.
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AdonisJS is a TypeScript-first web framework for building web apps and API servers. It comes with support for testing, modern tooling, an ecosystem of official packages, and more.
- nodejs
- nodejs-framework
- typescript
- typescript-framework
HTTP Request & Response Service, written in Python + Flask.
- http
- http-server
- testing
- service
The automatic type-safe REST library for .NET. Refit turns a REST API into a C# interface and generates the HttpClient implementation, with support for HttpClientFactory, pluggable serializers and a testing package.
Open Source Feature Flags, Experimentation, and Product Analytics
- abtesting
- statistics
- abtest
- experimentation
Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.
- open-source
- api-client
- api-testing
- developer-tools
Flagsmith is an open-source feature flag platform with remote config, experimentation, and self-hosted or cloud deployment options.
- feature-flags
- continuous-integration
- remote-control
- ci
A light-weight, flexible, and expressive statistical data testing library
- pandas
- validation
- schema
- dataframes
The interactive web server
:chart_with_upwards_trend: The Rack Based A/B testing framework
- split
- redis
- ab-testing
- ruby
Vest ✅ Declarative validations framework
- validation-library
- unit-testing
- form-validation
- react-validation-library
Flagr is a feature flagging, A/B testing and dynamic configuration microservice
- feature-flags
- ab-testing
- golang
- dynamic-configuration
GO Feature Flag is a simple, complete and lightweight self-hosted cloud native feature flag solution 100% Open Source — built on OpenFeature 🎛️
- feature-flags
- feature-toggles
- feature-flag
- feature-toggle
Enterprise-grade feature flag platform that you can self-host. Get started - free.
- dotnet
- feature-management
- remote-config
- csharp
⚒️ Redocly CLI makes OpenAPI easy. Lint/validate to any standard, generate beautiful docs, and more.
ASP.NET Core & Angular Universal advanced starter - PWA w/ server-side rendering for SEO, Bootstrap, i18n internationalization, TypeScript, unit testing, WebAPI REST setup, SignalR, Swagger docs, and more! By @TrilonIO
- angular
- universal
- ngrx
- hmr
A mail driver to quickly preview mail
Flexible production-grade boilerplate with Next.js 11, Vercel and TypeScript. Includes multiple opt-in presets using Storybook, Airtable, GraphQL, Analytics, CSS-in-JS, Monitoring, End-to-end testing, Internationalization, CI/CD and SaaS B2B multi single-tenancy (monorepo) support
- typescript
- typescript-boilerplate
- zeit-now
- isomorphic-react
Ruby on Rails like test fixtures for Go. Write tests against a real database
DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
A port of puppeteer running on Deno
HTTP requests collector to test webhooks, notifications, REST clients and more ...
- webhooks
- test-automation
- qa
- testing
Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.
- contract-testing
- microservices
- contract-driven-development
- cdd
WebTau (web test automation) is a testing API, command line tool and a framework to write unit, integration and end-to-end tests. Test across REST-API, WebSocket, GraphQL, Browser, Database, CLI and Business Logic with a consistent set of matchers and concepts. REPL mode speeds-up tests development. Rich reporting cuts down investigation time.