Set achievements in your app for when players do awesome things.

When your players reach an achievement, we unobtrusively give them a real-world reward.

We make it possible for you to build serverless applications with our secure, scalable web APIs for web and mobile development.

It's like Dropbox for your app's data.


A scalable real-time backend for your web app
Build apps really fast without the hassle of managing servers.

Ziptastic is a simple API that allows people to ask which Country,State and City are associated with a Zip Code.

Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services. The overarching goal of Swagger is to enable client and documentation systems to update at the same pace as the server. The documentation of methods, parameters and models are tightly integrated into the server code, allowing APIs to always stay in sync. With Swagger, deploying managing, and using powerful APIs has never been easier.

The Parse platform is a one-stop solution for your mobile backend. If you need to persist data from your clients to a server, you can use our platform and SDK to easily send and retrieve data to our servers.

Twilio provides infrastructure APIs for businesses to
build scalable, reliable voice and text messaging apps.

keword texting

Fast and professional voices for any type of project.

Mailgun is a set of powerful APIs that allow you to send, receive, track and store email effortlessly.

prices start at $1 per 1,000 emails ( $0.001 ) and go down from there. + monthly fee which starts at $19 and heads up

AskGeo provides a simple, fast, and accurate Interactive Map, Web API and Java Library for finding out the time zone information for a given location (latitude and longitude).

Context.IO is the missing email API that makes it easy and fast
to integrate your user's email data in your application.

Is a cron service with an api

Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality to web and mobile apps.

webapp that converts your HTML into XLS (Excel) and PDF.. Free plan is limited to 5 docs per month.

(link is to their inbound service)
$1.50 per 1,000 e-mails ($0.00015 ) with no monthly fee. You buy "credits" in advance.

offers analytics on what e-mails are getting to their destination. REST API, and more. Pricing starts at $0.10 per thousand emails sent

if you pay $79.99 per mo you get whitelisted for Yahoo / AOL / Hotmail. Cost per e-mail is >= $0.0007995 making this nearly 7x more expensive than some others but may have better support.

JSON API to send & receive email Allows users to e-mail your application.
Pricing is free (limited) to $149 based on # of emails.

($0.005 to $0.00015) ... postmark is cheaper (no monthly fee)

version of Jekyll with standalone server that responds to Metaweblog API so that you can use gui clients with it.

connecting to twitter via oAuth a step by step overview.

location API from Yahoo

A JavaScript API for creating and working with SVG graphics

useful api ,could be used to generate suggested tags when bookmarking a site? (haven't explored)

perl plurk api

php plurk API

OOP wrapper for the Moo.com API

a web service for storing, managing, and distributing video and audio content. The SesameVault API allows you to integrate SesameVault with your own application or service.

Net::Amazon::S3 is a simple, easy to use, pure Ruby implementation of the Amazon S3 REST API. It aims to provide a more Rubyish interface to the S3 API than other libraries and has no non-Ruby dependencies, so it’s completely platform-independent.

Web AIM brings the core AIM experience to the web, empowering developers to create mashups or rich internet applications integrated with AIM.

a simple demonstration of what is possible with AOL's new Web AIM API and its Javascript counterpart.

AdWords finally comes to rails! Manage your AdWords campaigns through irb or a rails application

Google's AdWords API service lets developers design computer programs that interact directly with the AdWords platform.

html and js api stuff

Quick Delicious API Ruby script

The Term Extraction Web Service provides a list of significant words or phrases extracted from a larger content.

the heretofore undocumented api that Google Reader is based on... soon will be officially documented

info on interfacing with blogmarks

the api docs

ruby interface to flickr api.. sooo easy

their web services api

the API for it