I don't have a math background, but I am an experienced programmer, and don't have problem in reading some introductory science books, and I would like to know more about some advanced math topics (well... At least to me it is), like tensors, differential geometry etc.
I have come across a math web site (www.mathsisfuncom) which I found to be sort of like what I was looking for (a topic-based organization of contents - so it is easier for me to find what I want, and newbie/kid-friendly at the same time), but the difficulty level is quite basic to me.
Are there any websites that can be re commended to me that can meet my needs?