iTunes university - free podcast and videos related to chemistry and anything you want to search for. Made by colleges and universities and high schools, but anyone can make the podcasts video's etc
BBC Science - Get the latest news in science and technology. Take a tour of the solar system, play science games, find out about science technology and discover how science began.
Mp-docker, has useful revision aids through online quizzes for both AS and A2 the quizzes are marked instantly.
The resources are made directly for Salter's but other exam boards have separate sections on the website.
Gateway to all the major Salter's online resources with links to the Nuffield advanced chemistry site which has a really useful FAQ section which answers those burning chemistry questions that you can never remember the answer to. Also contains quizzes.
This site is an introduction to chemistry that would be covered in a first year chemistry course. The list below is a suggestion in which order to view the site but you can select any topic that you wish to learn about.