Free
WireMock
Open SourceAPI Mocking · API Tools
Flexible API mocking and service virtualization for HTTP.
mockinghttptestingvirtualization
Browse the complete directory — use filters to narrow down.
API Mocking · API Tools
Flexible API mocking and service virtualization for HTTP.
Reference & Standards · Security
The world's foremost network protocol analyzer.
State & Forms · Frontend
State machines and statecharts for complex, visualizable logic.
API Clients · API Tools
Offline-first, open-source API client for REST, GraphQL and gRPC.
YAML · Data Formats
Validate and beautify YAML online.
Package Managers · Development Environment
JavaScript package manager with Plug'n'Play installs and workspaces.
CLI Tools · Development Environment
Blazing-fast terminal file manager written in Rust — async IO, image previews and plugin system.
CLI Tools · Development Environment
Portable command-line YAML, JSON, XML and CSV processor.
Editors & IDEs · Development Environment
High-performance, open-source editor written in Rust with collaboration.
Terminals & Shells · Development Environment
Beginner-friendly terminal multiplexer with layouts and floating panes.
Programming Languages
General-purpose language focused on robustness, optimality and clarity.
Authentication · API Tools
TypeScript-first schema validation with static type inference.
State & Forms · Frontend
Small, fast and scalable state management for React.