WARNING: Addictive games alert, if you want to stay productive, do not click on any of these links. :P Few years back, most of the online games were made with Flash, nowadays, with powerful browsers and web technologies, you can create games with just HTML, CSS and Javascript!
Describes how to avoid a flash of unstyled content that is usually styled through javascript on initial load.
Should be very applicable to us (Zendesk?).
Very useful jQuery simulator which lets you use different frameworks and many other options. Especially useful for sharepoint development, because deploying/closing sharepoint is slow in comparison.