This is a Java library for accessing the Stack Exchange REST API. It supports every rout and every site published by stackauth.

as easy as breathing... A robust, fully relational, easy to use, strongly typed, end-to-end StackOverflow API Client Library. Out of the box, Soapi provides you with a robust client library that abstracts away most all of the messy details of consuming the API and lets you concentrate on implementing your ideas.

An easy to use fluent JavaScript wrapper with end-to-end complete coverage for the StackOverflow API. Soapi.js is compact and has no dependencies, includes complete documentation and support for Visual Studio Intellisense

A .net client library which supports .Net 4, .Net 3.5, Silverlight 4 and Windows Phone 7.

StackKit is a library for accessing the Stack Exchange API from within Cocoa/Cocoa Touch applications. It is heavily modeled after Core Data and behaves very similarly.

This is a Python library/wrapper around the StackExchange and StackAuth APIs. It provides a clean, object-oriented API for accessing the various sites. http://github.com/lucjon/Py-StackExchange

My open source implementation of the Stack Exchange API for both Cocoa and Cocoa Touch. Implements most of the API. Is very simple and highly customizable!

A fully-implemented LINQ Provider to the StackExchange API

rubyoverflow is a library for querying the Stack Exchange API. It provides a ruby wrapper for the Stack Exchange API.

so++ is a wrapper for the StackExchange API written in C++. Everything is included in the repository, including documentation, makefiles, and of course, the source code.