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Handbook of Mathematical Functions is a public, free, very large collection of mathematical functions and numerical algorithms. It is useful for both mathematical reference and programming (e.g. write code to efficiently numerically compute a special function).
I used jemdoc to create this website. It is an excellent tool for creating static, simple yet elegant web pages.
I used JabRef for managing my references in BibTeX. I wrote a custom export filter for JabRef to export references to jemdoc, which I used to create my Publications list. You can find the filter in my software page.