The following links not adequately represent the multitude of different websites and sources available for teachers but they are ones that teachers report using regularly when they are surveyed about where they find and locate resources. Interestingly the most popular source of digital resources that teachers trust are recommendations from other teachers. Always ask around before you spend hours searching for something suitable, your colleagues may have a perfect solution already.
A great way to find a resource, especially if you know what you want to do but not how to do it, is to use the Digital Learning Selector created by the NSW Department of Education. The website has been embedded below.