Poll: What APIs do you consume most?

Github

DOM API through Javascript =)

reddit would be a good addition to the list.

I would add Wikipedia.

Paypal?

POSIX.

Win32

i did a web app map mashup of foursquare, gowalla, brightkite, twitter all in one, check out :

http://checkinmania.com

Since you added PayPal, you might as well throw Braintree in there. It's pretty great. I've been happy using it for an app I'm working on. Oh, and Mailchimp's API, too. I have a feeling that this list is going to go on and on.

http://www.braintreepaymentsolutions.com/gateway/api

http://apidocs.mailchimp.com/

No love for grooveshark?

YQL - It's a bit of an API of APIs (if one can say that) http://developer.yahoo.com/yql/

I made a Drupal frontend module for it here: http://drupal.org/project/yql

Stack Overflow http://stackapps.com/questions/1/api-documentation-and-help

Win32 :)

Simplegeo http://simplegeo.com/

Some love for Postmark?

http://developer.postmarkapp.com/

Mimeo

I find some interesting API from Mashape.

This is my favorite: http://www.mashape.com/component/BarCodeGenerator

OpenGL/CL.

Oh you meant /web/ APIs. As if Javascript is a language anyone really wants to program in. ;)

I've actually switched from google to bing maps recently. Finding it easier to use and having more useful returns. I'm actually beginning to write a gem wrapper if anyone agrees and wants to contribute :) http://xjst.in/fUtWeW /shamelessplug>

But before that, twitter is most used for me.

Lulu

cocoa

VideoSurf

jQuery