go-gitea/go-sdk

JSON-Server is an open-source Node.js tool from typicode that generates a REST API from a single JSON file, with full CRUD routes, query-param filtering, sorting, pagination, and relationship embedding built in. The GitHub repository and the project is MIT licensed. The current README documents a v1 beta; a separate v0.17.4 branch remains the stable release.

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

Django REST Framework is a toolkit for adding a REST API layer on top of an existing Django project. It supplies serializers, viewsets, routers, and a web-based browsable API, so a Django app that already has models can expose them as JSON without you writing raw request-parsing and response-formatting code by hand.

Dear ImGui is an open-source C++ library at ocornut/imgui for building graphical interfaces inside your own application, described in its own README as bloat-free and renderer agnostic. It targets content-creation tools, visualization panels, and debug UI for game engines and real-time applications rather than end-user software, and ships with officially maintained backends for DirectX, OpenGL, Vulkan, Metal, WebGPU, and more.