As someone who needs statistical knowledge but is not a formally trained statistician, I'd find it helpful to have a flowchart (or some kind of decision tree) to help me choose the correct approach to solve a particular problem (eg. "do you need this and know that and that and consider data to be normally distributed? Use technique X. If data is not normal, use Y or Z").
After some googling, I've seen several attempts of various coverage and quality (some not available at the moment). I've also seen similar flowcharts in statistics textbooks I've consulted in libraries.
A bonus would be an interactive site that, besides just having a chart, would provide extra info (such as assumptions) and would point to how to perform those techniques in popular stat packages. "Need to do ANOVA in R? You need package X and here's a tutorial".
I'm asking as a community wiki question in the hope there are better resources I couldn't find. Since statistics is a large subject, I think such a flowchart would be suitable for techniques that can be approached by someone who has beginner or intermediate-level knowledge. Anything more complicated would need someone with formal training.