An animated floating ship with fade-out steam. Pure CSS3 and HTML. No Javascript or Images used.

An animated teddy with balloon in pure CSS3 and HTML. No Javascript or Images used.

Shows a list of compatible operating systems and highlights the user's OS if it is in the list.

The cross-site request forgery (CSRF) prevention framework used by Valhalla. Automatically generates CSRF tokens and validates ...

Shows how certain operators can be constructed using only bitwise operators. This is often actually much faster for the compute...

An animated dancing snowman with pure CSS. No Javascript or Images used.

Tool for site admins to check their site's vulnerability to brute forcing. You must verify you own the site in order to use it.

Java version of the classic arcade game Duck Hunt. Audio and image files can be found here: http://halls-of-valhalla.org/images...

A simple class for cleanly organizing breadcrumbs for pages in PHP.