Arduino

Arduino Unleashed - This article is all about empowering you with more powerful tools that let you unleash your creativity without being limited by the default IDE.

Graffiti Research Lab

Instructables

Open Framework

Processing (Audio/Visual art programming for non-programmers)

Ladyada.net

TED (Cool talks on a wide variety of subjects)

MIT OpenCourseWare (free online video courses from MIT)

Google Code University

Boards.ie

In support to Anti-Piracy Law - Campaign Website - Download copyrighted song