Today I’ve found a nice site which brings together a lot of API’s into one place. A quick look into CSS, Javascript, XSL, Ruby, Hibernate, Oracle, MySQL, etc. normally requires a set of bookmarks on you machine. This tool has them all in one place! Check . What I really like is the autocomplete search feature and the organisation of the tabs. Thus it can be fully customized to your everyday development. Great idea!
Unfortunately there is no reference of any Microsoft technology (which is really a pain for me and i am sure for others as well) or Selfhtml which is a nice web reference for all german developers.