OpenID

OpenID is a decentralized identity system that provides a way to prove that you own a URL (identity). It does this without passing around a password, email address or anything you don’t want it to. Your profiile is your identity URL, but recipients of your identity can then learn more about you from any public, semantically interesting documents linked thereunder (FOAF, RSS, Atom, vCARD, etc.).

Practical PHP Programming

Paul Hudson wrote the book, that only exists online, Practical PHP Programming with the goal of making the task of learning PHP something fun that you do not have to worry about.

Google Areometer

Google Areometer adds the possibility to measure the size of an area using Google Maps! By clicking on the map you draw an area and the Areometer will show the size of it.

Zonsondergang bij Spaarndam

Helaas scheen de zon niet van onder op de wolken.