Best of April posts

A new tradition is getting started today, the month's best of posts.
At the beginning of each month, we will post an update of the best posts of the previous month.
Here are April's best

April 5th: Riya - Photo album with face recognition
A photo album site that allows identifying people inside the pictures automatically.

April 13th: Google calendar
An online calendar by google with gmail integration.

April 16th: 2006 Browser wars
A post on various browsers available.

April 22th: Wikipedia - the free encyclopedia
The free online encyclopedia written and edited by everyone.

April 25th: Catch 33 - a fun online game
Sometimes you need to have fun as well.

April 28th: Traffic based investment
discussion of the way site traffic reports relate to share prices of internet companies