LibU is a multiplatform C library that comes under a BSD-style license. It includes many interdependent modules for accomplishing several tasks: memory allocation, networking and URI parsing, string manipulation, debugging, and logging in a very compact way, plus many other miscellaneous tasks. It has a small footprint (about 70KB for the default configuration), it is modular, and it has a multiplatform nature, making it an ideal candidate for embedded systems. KLone is an example of such usage.
PSX is a PHP framework for creating RESTful APIs. It helps you to build clean URLs serving Web standard formats like JSON, XML, Atom, and RSS. It includes a handler system that abstracts away SQL queries from domain logic, a routing system that executes correct controller method for the location of the controller and the method annotation, and a flexible data system that converts database records into formats like JSON, XML, Atom, and RSS. A lightweight DI container handles dependencies. The controller supports request and response filters that can modify the HTTP request or response, and filters are provided for Basic and Oauth authentication.
Sql2xml is a CGI program that lets you request a SQL query and convert it to JSON, CSV, XML or INI through a Web server. Sql2xml supports requests from multiple users and for multiple databases. It is intended for developers who do not have direct access to database servers due to firewalls or other restrictions.
jQuery-JSONP is a compact (1.6kB minified), yet feature-packed, alternative solution to jQuery's implementation of JSONP. jQuery-JSONP features error recovery in case of network failure or an ill-formed JSON response, precise control over callback naming and how it is transmitted in the URL, multiple requests with the same callback name running concurrently, two caching mechanisms (browser-based and page based), the possibility to manually abort the request just like any other AJAX request, and a timeout mechanism. jQuery-JSONP has been tested and runs within all major browsers.
YAJL (Yet Another JSON Library) is a small event-driven (SAX-style) JSON parser written in ANSI C, and a small validating JSON generator. It's highly portable, data representation independent, fast, generates verbose error messages including context of where the error occurs in the input text, can parse JSON data incrementally off a stream, and is tiny.
Uhura is a Web console for databases. It works with MySQL, PostgreSQL, and FirebirdSQL. It presents trees that let you browse databases, tables, columns, constraints, triggers, views, and procs. It has panels for history and fragments. Its editor features autocompletion and autoindenting. It is easy to install.