Todas las APIs en una sola página gotAPI

Encontré este sitio que me pareció excelente: gotAPI

Tienen documentación para todas estas APIs

HTML / CSS / JavaScript
HTML at htmlhelp.com
HTML at w3.org
CSS at htmlhelp.com
CSS at msdn.microsoft.com
CSS2 at w3schools.com
JavaScript/DOM at w3schools.com
JavaScript/DOM on Firefox at mozilla.org

AJAX and Frameworks
Google GWT
Prototype.js v1.5 sergiopereira.com
Prototype.js v1.5 prototypejs.org -Dusan Maliarik New
jQuery 1.0.3 – Rich Manalang
Yahoo! UI – Misha Peric
MochiKit – Arnar Birgisson

XML
XSL at w3schools.com
XPath at w3schools.com
Schema (XSD) at w3schools.com
XML DOM at w3.org
DITA XML at oasis-open.org
DocBook at docbook.org

C/C++
C, C++, STL at cppreference.com
RogueWave at roguewave.com
Dinkumware C/C++/STL – Jason Petrone
Berkeley DB XML – Michael Driscoll
OpenGL 2.1 – James Darpinian

PHP
PHP at php.net
PHP Tutorials 600 from misc. sources
CakePHP at cakephp.org
Symfony at symfony-project.com

Ruby / Rails
Ruby / Rails at ruby-doc.org & rubyonrails.com
Ruby Standard Packages at ruby-doc.org
RMagic simplesystems.org – K. Adam Christensen

Python
Python at docs.python.org

More Programming Languages
Sicstus Prolog
Perl at activestate.com – Rowan Nairn
Erlang – Matthew Pflueger

Adobe / Macromedia
ActionScript
ActionScript (frames)
ColdFusion Tags/Functions
Flex 2

Groovy
Groovy 1.1 beta 1 – Marc Dexet Updated

Drupal CMS
Drupal 4.7/HEAD – Z.Karman

Flickr
Flickr API – parhuzamos

Orb API
Orb API – Orb Networks

Databases
MySQL at mysql.com
PostgreSQL at postgresql.org
Oracle9i
Oracle10g

Java
J2SE v1.3.0
J2SE v1.4.2
J2SE v1.5.0
J2SE v1.5 faster without AWT/Swing
J2EE
Struts
Spring Framework
Hibernate
Castor
Log4J
Apache RegExp
Apache Commons Net

Application Testing
JUnit
HttpUnit
DbUnit
Selenium – Tom Smyth

Java2ME
expand…
CDC Connected Device Conf v1.1.2
MIDP Mobile Inf. Device Profile v2.0
CLDC Connected Ltd Device Conf v1.1
FP Foundation Profile v1.1.2
PBP Personal Basis Profile v1.1.2
Bluetooth and OBEX v1.1
Web Services v1.0
Mobile Media v1.2

Apache Ant
Ant at ant.apache.com