Unified API for multiple data stores

Google OAuth Client Library for Java

Google HTTP Client Library for Java

The system aids distributed processing of large graphs. It also provides a Java API for developing distributed computing solutions to graph problems. The API abstracts a distributed computational model for graphs proposed in Google's research paper : Pregel: A System for Large-Scale Graph Processing.

Rate limiting can be an effective way of conserving resources and preventing automated or nefarious activities on your site.

ScraperWiki is all the tools you need for Screen Scraping, Data Mining & visualisation

jDBI is designed to provide convenient tabular data access in Java(tm). It uses the Java collections framework for query results, provides a convenient means of externalizing sql statements, and provides named parameter support for any database being used.

This site helps people to figure out if their Web site and APIs are RESTful, by interactively interrogating them and applying a suite of cloud-based analytics.

Written by Google, this library is a flexible, efficient, and powerful Java client library for accessing any HTTP-based API's on the web. It is the recommended library for accessing Google API's based on REST or JSON-RPC.

Berkelium is a BSD licensed library that provides off-screen browser rendering via Google's open source Chromium web browser.

Tynamo-federatedaccounts is an add-on to tapestry-security module and provides and API and components for federated authentication use cases, i.e. authenticating (your application) users with a third-party, such as Facebook, Twitter or Google.

RestFB is a simple and flexible Facebook Graph API and Old REST API client written in Java.
It is open source software released under the terms of the MIT License.

In this presentation, recorded at QCon San Francisco, ThoughtWorks' Ian Robinson explains how a RESTful HTTP approach can be applied in an Enterprise project. He makes use of many of the techniques that make HTTP a powerful protocol, including caching, hypermedia, and the use of standard formats such as Atom Syndication for event notification.

Java Gems are general purpose utilities for Java. Yes, Java Gems are those simple code snippets copied again and again from one project to another, often from your private project to several work projects, those small things you cannot find in java.util and its subpackages, but you cannot live without them.

Describes the ServiceLoader-Api

Amazon Simple Store Service (S3) is a service from Amazon that allows you to store files into reliable remote storage for a very competitive price; it is becoming very popular. S3 is used by companies to store photos and videos of their customers, back up

API Design principle

This demo page provides you with a simple mechanism for using the API and learning how it works. Each Google Base data API operation has an equivalent HTTP method, so you can try out the HTTP GET, POST, PUT, and DELETE methods as you invoke the operations

The Simple Logging Facade for Java or (SLF4J) is intended to serve as a simple facade for various logging APIs allowing to the end-user to plug in the desired implementation at deployment time. SLF4J also allows for a gradual migration path away from Jaka

A well-written API can be a great asset to the organization that wrote it and to all that use it. Given the importance of good API design, surprisingly little has been written on the subject. In this talk (recorded at Javapolis), Java library designer Jos

A JavaScript wrapper for the XMLHttpRequest object that enables the trivial implimentation of dynamic interfaces without the painful necessity for a complete page-refresh to talk to the server. In other words: Ajax without the confusing API.

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Editi

JDocs is a comprehensive online resource for Java API documentation.